The hunger for meat in Germany is great. Every inhabitant eats around 60 kilograms per year. Around 750 million animals are therefore slaughtered every year. Meat consumption has been falling for years, but only in the single-digit range. However, statistically speaking, every citizen still consumes around 1,100 animals in his life, including mainly chickens, but also just under 50 pigs and four cattle, as the BUND’s last meat atlas in 2018 calculated.

Meat causes a lot of CO ₂ , but provides the best protein

Meat is thus undoubtedly one of the staple foods. However, it is left out of the picture that meat consumption is devastating for the climate balance: Through animal production, a meat eater pollutes the atmosphere with a good 1,800 kilograms of CO ₂ per year and thus heats the climate catastrophe, vegetarians only make up about half of this.

Aside from that: nutritionally, meat offers a lot of positives. “Meat is definitely a high-quality food because it provides us with protein in particularly good bioavailability,” says Antje Gahl, press spokeswoman for the German Nutrition Society ( DGE ).

Animal protein, i.e. from meat and dairy products, can be used so well by our body because the composition of the amino acids is very similar to that of human protein. Animal protein usually contains all of the essential amino acids that we need in sufficient quantities, while plant-based foods often do not have the full spectrum of these amino acids. The body can therefore produce protein particularly quickly and appropriately from animal protein – for the muscles, for example.

In addition, meat is also characterized by other valuable ingredients:

• readily available iron,

• Selenium and

• zinc

– all minerals and trace elements that are indispensable for blood formation, immune system, cell health, fertility and much more. Another unique feature is the high proportion of B vitamins, including vitamin B12 , which is only found in sufficient quantities in animal foods such as meat, eggs, milk and dairy products.

Preserving nutrients through proper cooking

To ensure that these nutrients are preserved as well as possible during preparation, the expert recommends steaming and slow frying, preferably with little fat. Some B vitamins are sensitive to heat, such as vitamins B1, B2 and B6 – vitamin B12 a little less.

The way in which meat and meat products are prepared determines how many vitamins are destroyed and how undesirable pollutants are formed. Therefore, everyone should consciously pay attention to high temperatures such as when grilling or the duration of heating. The longer and hotter it is cooked, the more pollutants are created or parts of the valuable B vitamins are destroyed.

Nevertheless, barbecuing is particularly popular . An important tip from the expert for grilling: “Dab the marinade before you put the meat on the grill.” Otherwise it will drip into the embers, burn and, among other things, produce polycyclic aromatic hydrocarbons. PAHs are strongly suspected of increasing the risk of cancer.

Meat is healthy when prepared correctly. But is it also an indispensable food? “No”, says the qualified ecotrophologist. Apart from vitamin B12, which is also contained in milk and dairy products, each of these nutrients can be obtained from plant-based foods – even if not in the ideal composition and high quality that is given with meat.

The “dark side” of meat: cholesterol, purine and arachidonic acid

However, meat is also the main source of cholesterol. In high amounts, cholesterol is a risk factor for arteriosclerosis and thus heart attack and stroke. It is not only present in the visible fat in the meat, but also in low-fat pieces. 100 grams of lean meat provide around 50 milligrams of cholesterol per 100 grams. 300 milligrams per day is the maximum limit for the intake of cholesterol per day for healthy people, i.e. without a lipid metabolism disorder.

In addition, meat, especially offal, contains purine, i.e. uric acid, which supports gout. Arachidonic acid plays a role as the third negative, natural ingredient in meat. The body creates inflammatory substances from this fatty acid. Diet suggestions for diseases with an inflammatory character such as rheumatism are therefore always meat-free or strictly reduced in meat.

“The majority of the amount of cholesterol and purine ingested with food actually comes from meat and meat products such as sausage and ham, a particularly large proportion of which have offal,” confirms the scientist. Nevertheless, cholesterol is an indispensable substance in the body because it takes on important tasks in building cells and nerves. “But our body also produces cholesterol itself and is therefore not dependent on the intake with food,” she explains. Anyone who then eats a lot of meat and sausage quickly absorbs high amounts of cholesterol.

Red meat vs. White meat

However, not all meat is created equal . When it comes to health, a distinction is made between red and white meat. Red meat, i.e. beef, pork, lamb, sheep and goat, is considered particularly unhealthy because it is said to favor diseases.

“Anyone who eats a lot of red meat and especially processed red meat has a higher risk of colon cancer, as many studies indicate, according to the current state of knowledge, consumption of white meat (poultry) is not related to cancer,” says the qualified ecotrophologist. Overall, however, the quality, quantity and method of preparation of the meat are decisive in contributing to a healthy diet.

Pork is leaner, chicken is fatter than expected

But the animal from which the meat comes also plays an important role. How about pork, the most popular meat in Germany and the other types of meat consumed in this country?

pig

Depending on the fat content, pork provides between 100 and 250 kilocalories per 100 grams, 70 milligrams of cholesterol. It also has a high content of vitamins B1 and B6.

So pork is surprisingly low in calories, but provides more cholesterol than, for example, beef. “Reach less for high-fat parts,” advises Antje Gahl, “but because of its vitamin B1 and B6, zinc and iron content, pork can make a contribution to a wholesome diet.”

Pork is popular because of its fine taste and can be used in many ways, quickly prepared and is particularly suitable as pan-fried meat (schnitzel) or roast with a crispy rind.

Beef

In terms of calorie content, beef is comparable to pork, depending on the fat, has around 150 to 200 kilocalories per 100 grams and 50 milligrams of cholesterol. It scores with high levels of vitamin B12, zinc and iron.

The strong taste of beef is particularly appreciated by many meat eaters. Because of its long fibers, beef lean meat must be specially prepared; apart from the fillet pieces, it requires a longer cooking time.

poultry

White, tender meat and a nutty taste are the characteristics of chicken, duck, turkey and goose. Because of the layer of fat under the skin, poultry meat provides a relatively large number of calories, around 270 kilocalories per 100 grams. If you choose a skin-free steak, you only get around 160 kilocalories. The fat content is around 25 grams per 100 grams of poultry meat.

In addition, poultry meat is particularly rich in protein, so it provides a lot of energy. Zinc, potassium and B vitamins make poultry meat particularly healthy.

But be careful, the crispy skin of chicken and duck contains lots of purines, so it can increase the risk of gout. This is particularly relevant for those who already have elevated purine levels, warns the expert. However, poultry is safe for healthy people in this context.

But: “Poultry meat contains significantly more cholesterol than is generally assumed, namely around 90 milligrams per 100 grams,” she adds. Chicken may be low in fat, but that doesn’t mean it’s low in cholesterol, as is often assumed.

lamb

The tender, dark meat with its strong taste is not one of the Germans’ favorite varieties. However, it contains many B vitamins as well as iron and has a high proportion of valuable protein. What is surprising, however, is that on average lamb provides more calories than pork, almost 200 kilocalories per 100 grams of fresh meat, as well as 70 milligrams of cholesterol and many saturated (unfavorable) fatty acids.

Particular attention should be paid to the fatty acid composition with many saturated fatty acids in lamb. Like chicken, lamb is not fundamentally unproblematic when it comes to fat – as is often assumed.

Wild

It looks different with game meat. Saddle of venison, venison ragout, roast venison and wild boar are rarely served in Germany, although the meat is actually very low in fat, rich in protein and rich in vitamins B1 and B2, potassium, magnesium, iron, zinc and selenium – and therefore healthy. Depending on the variety, it provides only 100 to 160 kilocalories per 100 grams of fresh produce, with less than ten grams of fat, around 60 milligrams of cholesterol and hardly any purine.

However, game meat should only be enjoyed well cooked because it can contain parasites, as the Federal Institute for Risk Assessment ( BfR ) warns. The radiation exposure of venison can also be high, depending on the region. “In wild boars, values ​​are still occasionally measured today that exceed the limit value for marketing 600 Becquerel per kilogram by more than ten times,” reports the Federal Office for Radiation Protection BfS .

horse

Horse meat is also controversial, although it is very healthy with a high content of minerals, vitamins and protein, but low in fat (around two grams per 100 grams of meat) and low in cholesterol. Here there are more psychological reasons why the meat of the popular sport animals is frowned upon, in contrast to France , where it is coveted as a delicacy.

You can eat that much meat

Meat is therefore quite healthy. “Nobody has to go without meat in principle, because it is a valuable part of our diet,” says the expert. However, it depends on the amount, and the following applies: less is more.

The DGE recommends that people who eat meat do not consume more than 300 to 600 grams of meat and meat products per week. That goes for adults. So it’s practical: eat meatless for a few days, then a meat dish. A portion of meat can weigh 100 to 150 grams, a slice of cold cuts 15 to 25 grams, depending on the type.

“Meat makes perfect sense in a wholesome diet, because it covers the need for many important nutrients with a single food. Even these small amounts are sufficient for this. It is best to choose predominantly plant-based foods and supplement them with animal-based foods, ”emphasizes Antje Gahl.

Of course, that doesn’t mean everyone has to eat meat. Those who prefer a vegetarian diet can supply these nutrients through a targeted selection of different types of vegetables and fruits, whole grain products, legumes, nuts and dairy products.

Organic meat or meat from conventional farming

Meat consumption in moderation is therefore quite healthy. It is not necessary to weigh one type of meat against another. Variety as well as personal preferences, taste and last but not least religion are important, emphasizes the qualified ecotrophologist. For more and more people, the ecological balance of rearing and animal welfare also play a role, keyword antibiotics, but also manure pollution and thus nitrate in the groundwater.

In organic animal husbandry, even fewer antibiotics may be used than in conventional farming, although there has also been a reduction recently. It is different with manure, whether organic or bulk, every animal produces just as much of it.

The best advice: eat less animal foods and more plant-based ones. In this way, fewer resources are used, the environment is less polluted and CO ₂ emissions would be significantly reduced. Because meat production in particular produces a lot of the climate gas methane, which is many times more harmful to the climate than CO ₂ .

Halve meat consumption

But as mentioned at the beginning: With 60 kilograms of meat consumed per person per year, Germany is far from the moderate recommendations of the DGE, which make up at most half of this amount. Accordingly, healthy meat consumption should hardly exceed around 30 kilograms per year – for the benefit of health, animals and the environment.

Surveys by the Federal Statistical Office show that Germany’s men are getting fatter year after year: If the body mass index is used as a benchmark, 62 percent of men are currently overweight (BMI over 25) and 18 percent are obese (BMI over 30) . And while only a third of the 20 to 25 year olds are overweight, the proportion among the over 50 year olds rises to more than 70 percent. Among women, 43 percent carry too many pounds around – but the proportion of people who are overweight shrinks slightly every year.

Visceral belly fat is a health risk

But while many of the overweight women have the word “lose weight” at least in the back of their minds, the term “diet” bounces off most men. Somehow, around 30, they gradually lose their firm body, but they feel comfortable with their figure, which they do not find too fat at all. Men seem to be more tolerant of their paunch than women of their love handles.

This has nothing to do with reason, because it is now known that so-called visceral belly fat in particular poses a health risk. The metabolically active tissue releases inflammatory substances and increases the risk of cardiovascular diseases, diabetes and erectile dysfunction.

The traditional image of the man promotes obesity

Papa gets the biggest piece of meat because a man has to eat properly – this age-old belief persists in Germany. And so men eat an average of 1.1 kilograms of meat every week. That is twice as much as for women and twice as much as recommended for a healthy diet. In addition, there are plenty of carbohydrates in the form of pasta, potatoes or white bread, sausage, butter and cheese – and the plates are often scooped up on the “all-you-can-eat” principle.

Many men get fat because they eat and drink too much of the wrong things, for example six times as much beer as women. And they stay fat because it is very difficult to change established eating habits.

Men need a lot of motivation to diet

Doctors and nutritionists find time and again that men rarely lose weight because they find themselves too fat. It almost always takes an external spark for the average man to change something in his lifestyle, for example when the doctor diagnoses diabetes or a heart problem, or when a relationship breaks up.

This was also the result of an evaluation of two major diet programs by the British health authority NHS. And there were even more men-specific issues on the subjectLose weight:

• Only ten percent of men had received a referral from their doctor for the programs.
• But: Once men start with such a measure, they develop ambition to lose weight and get out less often than women.
• Men are more likely to respond to programs that avoid the word “diet” and place great emphasis on exercise.

Proper diet and exercise

Weight loss results mainly from diet changes. However, if men also expand their muscle cushion in the process, the effect is increased because of the high energy requirements of the muscles. Men should exercise all muscle groups in the body and not just squint at the fast-growing biceps.

A sporting program that includes a mix of strength and endurance is often better accepted by men than women. Sport should be fun in any case, because after actively losing weight, exercise can stabilize the desired weight – without the man having to constantly watch the calories.

What men should eat for weight loss is no different from a diet for women:

1. less red / fatty meat, sausage and animal fat

2. more vegetables

3. less white flour and sugar (carbohydrates)

4. more white / lean meat, tofu, or legumes (protein)

5. no alcohol

Intermittent fasting – as invented for men

Intermittent fasting is a suitable diet method for those who like it simple and uncomplicated. With the simple principle, there are time windows for food intake, which alternate with fasting episodes. The fat metabolism is activated, excess pounds can melt – especially if you keep an eye on the calories.

• The popular “16: 8” method is suitable as a permanent nutritional principle: During the day, people eat in an 8-hour window, two to three meals without snacks in between. The nocturnal eating break is extended to 16 hours – ideal for men who do not like breakfast.
• The “5: 2” interval fasting allows you to eat normally on five days, then there are a maximum of 500 calories on two days.
• The “1: 1” method is considered to be the most difficult to stick to: alternately eat one day and one fast.

For men (and women), the combination of two protein shakes and a normal meal a day is a good start to losing weight. US presenter and comedian Jimmy Kimmel lost over twelve kilos before he switched to intermittent fasting “5: 2”.

The man’s body is the best weapon against obesity

Once men have decided to lose weight, they enjoy a great advantage over women. Men are taller, heavier and have more muscles – as a result, their bodies burn more energy even when they are resting.

If they also save calories, they lose more weight and lose weight faster than women. This was shown by a study with 2000 male and female participants who had exactly the same general conditions. After eight weeks, the men saw 16 percent more weight loss. Their bodies cling less to fat deposits, which in women are a stubborn reservoir for pregnancy and breastfeeding.

The latest news from German slaughterhouses have certainly given the vegetarians and vegans community a new boost. In addition to animal welfare and ecological aspects, avoiding meat is usually also based on the desire for a healthy diet. What does science say

1. Consensus: little meat is okay, but not really necessary

Every German eats 150 grams of meat and meat products on average every day. That doesn’t sound like a lot, but it clearly exceeds the maximum 600 grams that the German Nutrition Society per week finds acceptable. Many consumers are also significantly higher. It is these “meat eaters” who are mentioned in the studies on the harmful effects of meat consumption.

But even with those who eat a lot of meat, there are differences: because those who eat a lot of unprocessed meat, and at the same time high in fiber and low in sugar, have a low risk of disease. This is the case, for example, with the Paleo diet.

Experts consider the Mediterranean diet to be the best nutritional method in the world, and it has been for two decades. In 2019 she was once again named the best diet of the year by “US News” . A lot of vegetables, fish and olive oil end up on the plate, but little meat and processed foods.

In comparative studies, it is not vegetarians and vegans who do well, but people who eat little meat.

But you can also say with a clear conscience to Tilmann Kühn, nutritional epidemiologist at the German Cancer Research Center (DKFZ) in Heidelberg: “If you eat wholesome vegetarian food, your body is fine. On the contrary, according to scientific findings, a vegetarian diet is actually very healthy. ”With one small caveat:“ Less meat ”only makes sense if the calorie advantage is not topped up with pizza, biscuits or meat imitations.

2. Those who do not eat meat also live more healthily in other ways

Numerous studies have shown that the biggest meat fans usually do not have good eating habits. Even if you neglect the nutritional value of individual foods, a diet high in meat and sausage as well as sugar, white flour and saturated fats from ready-made foods is unhealthy. Because healthy foods such as vegetables, fruit, legumes, whole grains or nuts are definitely neglected.

3. meat or plant? Nutritional studies are conditionally meaningful

In the laboratory, it is possible to determine how certain nutrients affect human cells. Studies with humans don’t work like that. The health comparison “meat eaters versus vegetarians” is only possible in observational studies. Their conclusions are only an approximation of reality. Too many factors play a role in health for the question to be reduced to schnitzel and tofu . For example: is a chain-smoking vegan healthier than an athletic meat eater?

Epidemiological studies can never conclusively prove that meat consumption is unhealthy. And it is also not conclusively clear which individual ingredients are harmful to health.

4. When it comes to meat, it depends on the color

Beef, pork, lamb or sheep provide the so-called red meat. It is said to cause cardiovascular diseases and problems with the blood vessels.

For US researcher Stanley Hazen from the Cleveland Clinic, a metabolic product of the carnitine contained in red meat is responsible for this. To prove this, he had 113 test subjects eat 250 grams of steak a day for four weeks. A two-week break was followed by four weeks with a correspondingly large amount of (white) poultry meat and, at the end, a meat-free month.

The result , published in the “European Heart Journal”, showed a significant 3-fold increase in the TMAO plasma concentration during the steak weeks. TMAO is produced during the metabolism of carnitine and is a risk marker for hardening of the arteries in the blood vessels. The diet with poultry and vegetables led to a decrease in plasma concentrations in the test subjects.

Red meat is also directly or indirectly involved in the development of cancer.

For example, studies by the DKFZ have shown that people who eat a lot of red meat have increased biomarkers of certain roasting substances, such as those produced during roasting and grilling, swim in the blood. These people were at an increased risk of developing colon cancer.

In the large-scale EPIC study across Europe, 519,000 test persons were examined to find out the connection between diet and cancer .

The results show that red meat can increase the risk of colon cancer. Accordingly, the risk of the disease increases by almost 50 percent if the daily consumption of meat is 100 grams above the recommended amount. The same amount of sausage products increases the risk by as much as 70 percent.

The risk of stomach cancer is also said to be related to heavy meat consumption. In people infected with the Helicobacter pylori bacterium, the risk increases by a factor of five.

5. Theory 1: Iron makes meat unhealthy

There are various theories about why red meat is so problematic. The so-called iron load hypothesis is based on the fact that red meat contains a comparatively high amount of iron. This so-called heme iron has a high bioavailability, unlike iron from plant food, and thus enters the organism in larger quantities.

It has long been suggested that high levels of iron in the blood increase the risk of cancer . However, this theory has not yet been proven by studies.

6. Theory 2: BMMF make meat unhealthy

Scientists working with Nobel laureate Harald zur Hausen believe they have found another cause: a previously unknown class of pathogens is responsible for the increased risk of colon cancer .

These “Bovine Milk and Meat Factors (BMMF)” enter the human intestines through the consumption of meat and dairy products from European cattle. There it comes to a chronic inflammation, which indirectly promotes the development of colon cancer.

7. Avoiding meat protects the intestines

Vegetarian foods contain fiber, which has a positive effect on the microbiome in the gut. Vegans have a particularly large number of them. In addition to fruit and vegetables, lactic acid foods such as yogurt also support the intestinal flora. Vegetarians often consume these. Researchers from the University of New York have confirmed that vegans and vegetarians have more protective types of gut bacteria than meat eaters.

Meat also poses a cancer risk through its preparation and processing: for example, when meat is heated up, several potentially harmful substances are formed at the same time, including so-called polycyclic aromatic hydrocarbons (PAHs); curing also produces nitrosamines. These substances can promote the development of cancer, and above all they increase the risk of colon cancer. Methods such as curing and intense heating are particularly used for industrially processed meat, such as sausage and ham. Accordingly, processed meat products are particularly unhealthy.

8. Avoiding meat makes you slim

Researchers at the Max Planck Institute for Cognitive and Neurosciences (MPI CBS) and the Leipzig University Hospital examined almost 9,000 people, what connections there are between body and mind on the one hand and not consuming animal products on the other. regardless of age, gender and level of education. The study was published in June 2020 in the specialist magazine “Nutrients”.

The result of the physical impact: the less food of animal origin was on the menu, the lower the average body mass index (BMI) and thus the body weight. “Products that are excessively high in fat and sugar make you fat. They stimulate the appetite and delay the feeling of satiety. If you do without animal foods, you eat fewer such products on average, ”explains Evelyn Medawar, first author of the work.

9. Avoiding meat and the psyche

With regard to the psychological effects of the meatless diet, the Leipzig study found no particular susceptibility to neuroses in vegetarians. The study director Veronica Witte says: “Previous analyzes had found that more neurotic people generally leave out certain food groups more often. We focused solely on avoiding animal products and could not observe any correlation. ”No connection was found between a predominantly plant-based diet and depressive moods. There was evidence of this in previous studies.

However, the researchers found a difference in one of the determining factors of personality: the extroversion or introversion. People with predominantly plant-based foods on the menu are more introverted than those who eat primarily animal products. The study authors have not yet found an explanation for this.

Magnesium is particularly well known in connection with magnesium deficiency and cramps. This applies to nocturnal calf cramps, but also massive cramps in athletes. But this important role that magnesium takes on for well-functioning muscles, only reflects a tiny aspect of its very broad spectrum of activity with diverse, vital functions.

What is magnesium

Magnesium is a mineral and belongs to the group of metals. This mineral is essential. This means that the body cannot produce magnesium itself, but the mineral is vital and must therefore be supplied with the diet. It is then absorbed through the intestinal walls and gets into the blood. Any excess is excreted through the kidneys with the urine. High fat foods, oxalates and phosphates can slow down the absorption of magnesium in the intestine.

Around 25 grams of magnesium are present in the organism (in a person weighing 70 kilograms). A good half is in the bones, a little less in the muscles and only one percent in the blood. The bones also act as magnesium stores. However, the magnesium content in bones decreases over the course of life.

In addition, minerals are divided into bulk and trace elements. Magnesium is one of the bulk elements because the body needs relatively large amounts of it, unlike trace elements such as iodine and copper.

Why Magnesium is Vital

Magnesium is involved in the activation of over 300 enzymes in the body, including in the protein structure. The mineral takes on decisive tasks for energy and cell metabolism and regulates many vital functions, including:

• Impulse transmission in muscle and nerve cells, magnesium ensures normal conduction of excitation in nerves and muscles. In connection with nerves, magnesium also supports brain functions and via the muscles, for example, the heart muscle. Adequate magnesium intake even seems to reduce the risk of sudden cardiac death, a study suggests.
• Magnesium influences the heart rhythm and blood pressure.
• It relaxes muscles, nerves and blood vessels and can reduce the production of stress hormones. This normalization of the excitability of nerves and the vascular tension is probably responsible for the fact that with an adequate supply of magnesium, among other things, the number of migraine attacks demonstrably decreases, as the analysis of several studies showed.
• Magnesium can reduce the clumping of blood platelets, so it can support normal blood clotting. The risk of having a stroke decreases when the body receives enough magnesium, further research shows .
• It is involved in the utilization of glucose and in blood sugar control. The risk of type 2 diabetes has been shown to decrease if the mineral is taken in sufficiently.
• Magnesium is an important antagonist of calcium, prevents too much calcium from being stored, for example in muscles, but also vessels and organs. Magnesium can prevent the formation of kidney stones, which often consist of calcium oxalate.
• In addition, magnesium can neutralize too much stomach acid somewhat and thus reduce the risk of heartburn.
• In conjunction with calcium and vitamin D, magnesium controls the bone metabolism. Among other things, magnesium supports the activation of vitamin D in the kidneys. Magnesium is therefore an important factor in preventing osteoporosis. Already existing osteoporosis could be slowed down somewhat by adequate intake, as a study suggests.
• The mineral regulates important messenger substances that also play a role in the mental mood. Studies show that magnesium can have a similar effect on mild depression as certain antidepressants , the selective serotonin reuptake inhibitors (SSRIs). 

Overall, these and similar studies provide strong indications that an adequate supply of magnesium, including through dietary supplements, is associated with a lower risk of numerous common diseases.

• So far there have been various theories about the origin of noise.
• Researchers observed the process in the magnetic resonance tomograph.
• There is no indication of whether the cracking is bad or good for the joints.

The cracking noise when pulling apart of fingers formed according to a study by the formation of a cavity in the joint.

Finger in the magnetic resonance tomograph

In the investigation, Greg Kawchuk’s team from the University of Alberta in Edmonton, Canada, took a closer look at a man’s metacarpophalangeal joints in an MRI scanner. The scientists present their results in the journal “PLOS ONE” .

Is there a threat to health?

Some people can crack their joints when they pull their fingers apart. There is currently no evidence as to whether this phenomenon is bad or good for the joints. “So far, no one has ever been able to prove that this  cracking is harmful to health in the long term,” says Professor Jörg van Schoonhoven from the Clinic for Hand Surgery at the Rhön Clinic in Bad Neustadt an der Saale.

Different theories

For a long time there have been various theories about where the popping sound when clicking your fingers comes from. Some scientists suspected that the crackling sound was caused by a bursting bubble in the joint space.

Other researchers hypothesized that the sound is caused by the flapping of ligaments.

Another explanation for the origin of the cracking is what is known as tribonucleation: a mechanism in which the movement of surfaces creates gas bubbles in a liquid.

Study author as guinea pig

To date, there has not been any direct experimental evidence that solidly supports any of the theories. Kawchuk’s researchers wanted to change that. 

For their study, the scientists needed someone who had the ability to crack their metatarsophalangeal joints on request. These joints connect the bones of the metacarpus to the base members of the fingers. The choice fell on Jerome Fryer, one of the study authors.

Pull until it cracks

In the experiment, the researchers examined each finger of the test subject in isolation in a special magnetic resonance tomograph, with which movement sequences can be recorded.

The finger was attached to a kind of tube that was connected to a cable at the other end. Then the cord was pulled until Fryer’s fingers cracked. The entire process in the joint was recorded with an MRI scanner.

Is a cavity the cause?

Shortly before the cracking could be heard, the researchers were able to observe the formation of a cavity in the images.

The scientists therefore assume that tribonucleation has taken place in the joint: “It is a bit as if a vacuum is being formed,” explains Kawchuk in a communication on the study. “If the joint surfaces suddenly separate, there is no longer any liquid left to fill the increasing joint volume. This creates a cavity.” The noise is generated by this event. 

“It is interesting to know what acoustic phenomenon is behind the cracking of the fingers,” said the hand surgeon van Schoonhoven. However, by including only one person in their study, Kawchuk’s researchers would be able to explain the phenomenon only for that person. “The experimental setup does not allow any generalized statements,” said van Schoonhoven.

• Osteoarthritis results from wear and tear on bones and joint capsules.
• Five million Germans suffer from the consequences.
• Briefly explained: which osteoarthritis treatment helps whom?

If the joints hurt, it is usually osteoarthritis : it is the most common of all joint diseases. About five million Germans suffer from it. Osteoarthritis occurs when bones, ligaments, tendons and joint capsules wear out.

This is important to differentiate the disease from rheumatoid arthritis. Inflammation is the cause here.

This is important for osteoarthritis treatment

“Arthrosis is a disease that runs in waves,” explains Johannes Flechtenmacher, President of the Professional Association of Orthopedists and Trauma Surgeons. Less painful phases alternate with those that torment those affected.

The aim of the treatment is to relieve the pain on the one hand and to maintain or restore the ability to move on the other.

Osteoarthritis needs combination treatments

Ideally, the doctor combines non-drug treatments such as physiotherapy, nutritional recommendations, and hot or cold applications with medication. These are mainly used in the acute pain phase.

“In the less painful episodes, patients should try to avoid medication,” explains Flechtenmacher. In principle, movement in particular is an important component of therapy. His motto: “Move a lot, load little.”

Five osteoarthritis treatments put to the test:

1. NSAIDs: cortisone-free pain relievers

This is how the drug works: The non-steroidal anti-inflammatory drugs (NSAIDs) are the classic all-rounders in pain relief. They have both anti-inflammatory and analgesic effects, but do not contain cortisone.

Medicines include ibuprofen, diclofenac, or naproxen. They block two important enzymes that play a role in the sensation of pain: Cyclooxygenase (COX) isoenzymes I and II.

The so-called Cox II inhibitors are therefore well suited to treat acute joint pain associated with osteoarthritis.

NSAIDs also have an antipyretic effect.

Side effects: Gastrointestinal complaints and an increased risk of cardiovascular diseases are among the risks of NSAIDs. “That is why it is particularly important to tailor the osteoarthritis treatment to the patient,” explains orthopedist Flechtenmacher.

For example, ibuprofen is not suitable for patients with kidney problems, and diclofenac hits the liver. Both drugs also have a negative effect on the cardiovascular system. Naproxin is therefore better suited for heart disease patients with osteoarthritis.

2. Opioids

This is how the drug works: Opioids are effective remedies that are used against severe joint pain. By attacking the opioid receptors, they prevent pain from developing and being transmitted.

Tramadol is one of the morphine-like drugs. “Morphines are not suitable for treating acute phases of pain in osteoarthritis,” says Flechtenmacher. This is especially true for plasters. Morphine should only be used for chronic treatment if no other therapy is helping the patient.

Side effects: Many sufferers suffer from the exhaustion caused by morphine. Especially in older people, opioids aggravate many age problems. These include, for example, constipation and dizziness. This also increases the risk of frail patients falling.

3. Hyaluronic acid

In addition to drugs that directly combat pain, there are active ingredients that intervene in the mechanism of the disease. A typical representative is hyluronic acid.

This is how the drug works: Doctors inject hyaluronic acid into the joint to treat osteoarthritis. That’s the only way it works. “In contrast, it is pointless in tablet form, as is sometimes offered,” explains Flechtenmacher. Only in the joint does the drug help the knees or fingers move more smoothly.

With regard to evidence-based studies, hyaluronic acid should be viewed critically, adds the doctor. For example, the relief of osteoarthritis on knock knees or bow legs, where it is biomechanically induced, works less well than on straight legs.

Side effects: As a rule, osteoarthritis patients tolerate hyaluronic acid very well. Since it is injected directly into the joint, there is the usual risk of infection from the method.

4. Natural medicine

This is how the treatment works: Natural active ingredients such as nettle leaves, willow bark or devil’s claw should also relieve pain. The latter contains, among other things, harpagoside. Similar to the non-steroidal anti-inflammatory drugs, they are supposed to inhibit the formation of the pain messenger prostaglandin.

“So far, however, nothing has been identified in evidence-based studies that proves the effectiveness of the natural active ingredients,” explains Flechtenmacher.

Side effects: They are dependent on the natural medicine product. The instruction leaflet of the devil’s claw, for example, warns of possible gastrointestinal complaints such as diarrhea, nausea, flatulence, vomiting as well as dizziness and headaches or rashes.

5. Acupuncture

This is how the treatment works: As with natural active ingredients, evidence of how acupuncture works for osteoarthritis has not yet been provided in scientific studies.

On the contrary. An Australian study looked at the effects of acupuncture. The results published in the “JAMA” magazine showed: Acupuncture with needles or laser has no relevant effect on pain and function in patients over 50 with knee osteoarthritis and moderate or severe chronic pain.

However, acupuncture helps some osteoarthritis sufferers. Johannes Flechtenmacher, for example, relies on the alternative form of treatment

• light and irregular pain
• when many illnesses in the affected person rule out other drugs.

In addition, there are many patients who benefit from the doctor’s attention and empathy alone.

Side effects: The symptoms can get worse at first, writes the German Pain Society on acupuncture . And adds: “Occasionally there are slight bruises or bruises, and brief circulatory reactions can also occur during acupuncture treatment.”

In any case, those affected should not treat their joint pain independently, but should always have it checked out by a specialist.

• If you want to do something about osteoarthritis, you should exercise.
• With these sports you can prevent.
• At the same time, those affected can still practice many sports.

Anyone who hurts movements in their knees, shoulders or ankles usually suffers from osteoarthritis. It is the most common joint disease. At least five million Germans suffer from it. Experts even speak of 35 million people affected in Germany for early forms of osteoarthritis.

From the age of 30, the risk increases linearly. Among those over the age of 60, 50 percent of women and a third of men suffer from osteoarthritis.

Strictly speaking, however, everyone would get osteoarthritis, says Karl-Dieter Heller, chief physician at the Orthopedic Clinic Duchess Elisabeth Hospital. From the age of 40 at the latest, arthritic changes appear in the X-ray. Osteoarthritis occurs when bones, ligaments, tendons and joint capsules wear out.

• The body’s own stem cells have a positive effect on osteoarthritis-related inflammation in the knee.
• A study now wants to clarify whether they actually build up permanent cartilage.
• A transplant can repair minor cartilage damage in young patients.

After a certain age, signs of wear and tear become noticeable in the knee . After the age of 30, the risk increases linearly. The painful, inflammatory breakdown of cartilage in the operating room and with an artificial knee ends 150,000 times a year. Then smooth metal has to replace the cartilage layer, which allows round, painless movements in a healthy knee.

The idea frightens many people suffering from osteoarthritis. They hope for new methods to rebuild lost cartilage: stem cells should help.

Belly fat provides the best stem cell material

The doctor uses the patient’s belly fat as a starting material. The idea behind it: stem cells can be obtained particularly easily and in relatively large numbers from vascular fat tissue. Injected at the location of the defect, they learn from the microenvironment into which cell type they should develop.

According to this principle, the doctor and stem cell researcher Eckhard Alt uses the undifferentiated cells : Stem cells from the patient’s fat tissue are processed in the operating room within an hour and injected into the patient where he needs them – for example into the osteoarthritis knee.

The founder of the “Interdisciplinary Stem Cells Research Center” in Houston and a private clinic in Munich sees stem cells as the future therapy for chronic inflammatory diseases of the musculoskeletal system – among other things.

The cell extract in the knee does not guarantee success

Some orthopedic practices that offer the procedure honestly state that it is a not generally recognized attempt at healing with no guarantee of success. Rather, it is a final experimental attempt to remedy knee problems without a joint replacement.

“In this so-called ‘point-of-care’ application, a cell extract is injected that not only consists of stem cells,” explains Oliver Pullig from the Fraunhofer Translational Center for Regenerative Medicine in Würzburg. How many stem cells that are supposed to develop into cartilage material actually get into the knee is just as little regulated as the preparation of the suctioned off belly fat.

Stem cells instead of knee prostheses

A Europe-wide study is currently looking for scientific evidence of the anti-osteoarthritis potential of the body’s own stem cells.

A small one with six patients in Würzburg and twelve in Montpellier, France, led to success in 2013: Almost all participants canceled their previously unavoidable operation for a knee prosthesis. “Your complaints had improved throughout,” explains Oliver Pullig. “A reconstruction of cartilage was unlikely with such a large damage.”

The follow-up study that has just begun with 153 participants at ten European locations therefore fulfills a requirement that the German study director Ulrich Nöth from the Evangelical Forest Hospital Berlin-Spandau formulated back then: Stem cell therapy is best suited for patients with middle and middle-aged osteoarthritis. You are no longer eligible for a cartilage transplant, but you are too young to have an artificial joint.

New cartilage from stem cells? A study should show it

Like the pilot study, the ADIPOA2 study uses so-called mesenchymal stem cells from the abdominal fat of each subject. These precursor cells of the connective tissue have the ability to develop into cartilage, bone or fat cells.

Biologist Oliver Pullig explains: “We take 100 milliliters of belly fat from each participant. The stem cells obtained from this are multiplied millions of times in special laboratories. That takes a good two weeks. 51 patients then receive two million of these pure stem cells injected into the joint, 51 patients receive an injection with 10 million cells and 51 patients receive a placebo. “

Results should be available by the end of 2018, and thus scientific proof of whether stem cells fulfill the hope of permanently building cartilage. The scientist is optimistic: “If successful, the therapy with stem cells as a drug could be ready for the market at the next study level. It doesn’t take five years. “

Cartilage transplant only helps to a limited extent

Another method to restore lost cartilage is transplantation, which has been tried and tested for 20 years. So far, however, it has only been successful in the case of centimeter damage in an otherwise intact knee. The operation is laborious and the healing process long.

In the first keyhole surgery, the doctor removes a small piece of healthy cartilage, hardly larger than a grain of rice. These cartilage cells are propagated in the laboratory in three to four weeks. In a second operation, the surgeon places these cells or the cartilage patch on the defective area in the knee.

After that, the knee must not be subjected to any load for six weeks, then only lightly for another six weeks. Only after a year is the joint stable enough for sport to be possible.

Cartilage from the laboratory is expensive

The transplant is only suitable for younger knee patients whose cartilage and joints are free from osteoarthritis. If this therapy is successful, it can prevent further cartilage damage and a later threatened knee prosthesis.

Then, in the long term, the costs of several thousand euros for cells grown in a laboratory will pay off.

Hyaluronic acid can at least relieve pain

If these methods are out of the question, another remedy can help: synthetic hyaluronic acid is often misunderstood as a substance for building up cartilage. However, it cannot produce worn cartilage, but serves as a lubricant and for joint care.

Orthopedic surgeons inject the moisture-retaining gel three to five times at weekly intervals. Hyaluronic acid relieves pain and promotes mobility – permanently for some patients, at least for a year or two for others. Then the treatment can be repeated.

If you rest, you rust. There is a lot of truth in this banal wisdom – especially when it comes to muscles and joints. Those who are young have often integrated sport into everyday life as a matter of course. But with age, people often give up. That is fatal.

Because it is precisely at the age of three that there is a significant drop in performance, explains Karl-Dieter Heller, chief physician at the Orthopedic Clinic Duchess Elisabeth Hospital. The muscles begin to break down. Right here it is called to hold against.