Betaine, also known as trimethylglycine, is an organic chemical compound that plays a key role in methylation and osmoregulation processes in the body. The chemical structure of betaine consists of glycine attached to three methyl groups, making it a strong methyl donor. Natural sources of betaine include foods such as sugar beets, spinach, whole grains, and seafood.
The importance of betaine in the body
Betaine plays an important role in metabolism, protects cells from osmotic stress, and supports cardiovascular health by affecting blood homocysteine levels. More and more research indicates the benefits of using it not only in health prevention, but also in improving sports performance.
Betaine and heart health
Homocysteine and Cardiovascular Health
Homocysteine is an amino acid that, in excess, can damage blood vessel walls and promote the development of atherosclerosis. Betaine, acting as a methyl group donor, supports the conversion of homocysteine to methionine, which reduces its concentration in the blood. High levels of homocysteine are considered a significant risk factor for the development of cardiovascular diseases, such as heart attack and stroke.
Clinical Studies on the Effects of Betaine on Heart Health
Numerous clinical studies have shown that betaine supplementation helps lower homocysteine levels, which translates into a reduced risk of atherosclerosis and other cardiovascular diseases. In one study, regular betaine supplementation in people with elevated homocysteine levels led to significant improvement in vascular endothelial function and reduced levels of inflammatory markers.
Blood vessel protection
Betaine supports healthy blood vessels by improving endothelial function and reducing oxidative stress. Acting as an antioxidant, betaine protects blood vessel cells from free radical damage, which promotes better blood flow and reduces the risk of developing heart disease.

Betaine in metabolic prevention
The effect of betaine on lipid metabolism
Betaine supports lipid metabolism, helping to maintain healthy blood cholesterol levels. Studies suggest that betaine may reduce LDL cholesterol, a key risk factor for atherosclerosis. Additionally, betaine supports the elimination of excess fat from the liver, which may prevent fatty liver disease.
Blood glucose regulation
Betaine may also have a beneficial effect on insulin sensitivity and blood glucose regulation. Its action in this area may contribute to better control of glucose metabolism, which is important in the prevention of type 2 diabetes.
Prevention of metabolic syndrome
Metabolic syndrome, characterized by hypertension, abdominal obesity, elevated glucose levels, and abnormal lipid profiles, is one of the most important risk factors for cardiovascular disease. Betaine supplementation may help prevent metabolic syndrome by supporting healthy fat and glucose metabolism.
Betaine and sports performance
Improving physical performance
One of the mechanisms of betaine's action in the context of athletic performance is its effect on creatine synthesis, which is crucial for energy production in muscles. Betaine increases the availability of methyl groups needed for creatine synthesis, which translates into greater muscle strength and endurance during physical exercise.
Research on improving strength, endurance and training effectiveness
Clinical studies indicate that betaine supplementation may help increase athletic performance by improving muscle strength and endurance. In strength-trained individuals, betaine supported an increase in lean body mass and a reduction in body fat.
Increased lean body mass
Betaine helps increase lean muscle mass by increasing creatine availability and improving protein metabolism, making it a popular supplement among athletes looking to improve body composition and physical performance.
Protection against oxidative stress and fatigue
Betaine acts as a powerful antioxidant, protecting muscles from damage caused by oxidative stress during intense training. Reduction of oxidative stress translates into better recovery and less fatigue after exercise.
Betaine as a Regeneration Supporting Agent
Impact on muscle regeneration after training
Betaine has great potential when it comes to muscle recovery after intense physical exercise. It affects the synthesis of creatine, which is necessary for the reconstruction and growth of muscle fibers. Studies suggest that supplementation with betaine can reduce muscle fatigue after training and accelerate their recovery. This mechanism is based on the ability of betaine to reduce muscle cell damage and improve their ability to store water, which affects the optimization of hydration and protection against injuries.
Anti-inflammatory effects of betaine
Betaine also has anti-inflammatory effects, which is especially important in the context of intensive training. Physical activity causes inflammation in muscles, which can lead to muscle damage and delayed regeneration. Betaine reduces inflammation by reducing the level of pro-inflammatory cytokines, such as TNF-α and IL-6, which are associated with inflammatory processes in the body.
Impact on hydration and electrolyte balance
As an osmolite, betaine supports osmotic balance in cells, which improves hydration and protects against dehydration. In the context of sports, where fluid loss is often a problem, betaine can play an important role in maintaining adequate hydration and protecting against thermal and electrolyte stress.

Betaine supplementation in sports
Optimal dose of betaine for athletes
The recommended dose of betaine supplementation for improving athletic performance is around 2.5 grams per day. Clinical studies indicate that this dose is sufficient to see benefits related to improved strength, endurance, and muscle recovery without significant side effects. Increasing the dose may not provide additional benefits or may even lead to gastrointestinal discomfort.
Side effects
While betaine is generally safe to use, over-supplementation can lead to digestive issues, such as diarrhea, nausea, and stomach cramps. It is therefore advisable to follow the recommended dosages, especially for those who are new to betaine supplementation.
Interactions with other supplements
Betaine can work synergistically with other popular sports supplements. For example, supplementing with betaine in combination with creatine can further support ATP synthesis, which helps improve training performance. Betaine can also work with BCAAs (branched-chain amino acids) to support recovery and protect muscles from damage caused by intense exercise.
Comparison of Betaine to Other Performance Supplements
Creatine
Betaine and creatine, although they have different mechanisms of action, support the same physiological processes – they increase energy availability in muscle cells by supporting ATP synthesis. Creatine is mainly known for improving muscle strength and endurance, while betaine additionally affects osmotic balance and protection against oxidative stress. The joint use of both of these supplements can provide synergistic benefits for strength training individuals.
Beta-alanine
Beta-alanine, like betaine, supports athletic performance by reducing muscle fatigue. Beta-alanine, however, works differently – it increases the concentration of carnosine in the muscles, which delays acidification and reduces muscle fatigue. Betaine, on the other hand, protects muscles from oxidative stress and supports cell hydration, which can complement the effects of beta-alanine.
L-carnitine
Betaine and L-carnitine work on different aspects of fat metabolism. L-carnitine supports the transport of fatty acids into the mitochondria, where they are burned for energy, which is key in reducing body fat. Betaine, on the other hand, supports lipid metabolism by improving osmotic balance and creatine synthesis, which additionally supports the growth of lean muscle mass.
Betaine in the Context of Athletes' Diets
Diets rich in betaine
Natural sources of betaine, such as beets, spinach, quinoa, and whole grains, can be an important part of an athlete’s diet. Introducing these foods into your daily menu can support natural betaine supplementation, helping to maintain metabolic health and supporting athletic performance.
Betaine in the ketogenic and low-carb diet
Betaine may also be helpful for athletes following high-fat, low-carb diets, such as the ketogenic diet. In such diets, betaine helps regulate fat metabolism while supporting healthy homocysteine levels, which is important in preventing cardiovascular disease.
Potential Future Directions for Betaine Research in Sports
New research on performance
The field of research on betaine in the context of sports is constantly evolving. Future studies may focus on the long-term effects of betaine on performance in endurance sports such as marathon running or cycling. Research on optimal doses and duration of supplementation may provide new recommendations for athletes from various disciplines.
Synergy with other supplements
Betaine could be tested in conjunction with other ergogenic supplements, such as caffeine, to see how it affects endurance and recovery. Such studies could provide valuable information on the best supplementation strategies for different athletes.
Long-term effects of betaine supplementation
Another interesting area for research is the evaluation of the long-term effects of betaine supplementation both in athletes and in health prevention. The effectiveness of betaine in the context of protecting heart health, improving metabolism and supporting muscle regeneration could also bring benefits to the elderly or those struggling with chronic diseases.
Summary
The main benefits of using betaine
Betaine is a versatile compound with a broad spectrum of action. It supports heart health, reduces homocysteine levels, supports lipid metabolism and improves athletic performance. Its antioxidant and anti-inflammatory effects make betaine a valued supplement in both health prevention and sports.
The Importance of Betaine Supplementation
Betaine supplementation can bring tangible benefits to both athletes and people who want to take care of their cardiovascular health and... metabolism. It offers support in muscle regeneration after physical exertion, reduces fatigue, protects against oxidative stress and supports the functioning of the circulatory system. Due to its multifaceted effects, betaine is gaining increasing importance in sports supplementation and health prevention. Regular use can improve sports performance and general health, reducing the risk of cardiovascular diseases, improving lipid metabolism and muscle regeneration.
Sources:
- Newborn screening for homocystinuria and methylation disorders: systematic review and proposed guidelines
- The metabolic burden of methyl donor deficiency with focus on the betaine homocysteine methyltransferase pathway
- Choline and betaine in health and disease
- Ribosomal modification protein rimK-like family member A activates betaine-homocysteine S-methyltransferase 1 to ameliorate hepatic steatosis