Methionine: properties, application in sports, dosages

Author: Slauta Alexander - sports nutrition specialist and gym trainer.
2015-01-02

Every person needs a normal intake of amino acids — structural chemical compounds that make up all proteins. The variety of forms of protein compounds is involved in all physiological processes of the body. Therefore, if you are engaged in sports or lead an active lifestyle, it is worth including additional intake of biologically active supplements that contain amino acids in your diet. This article will focus on L-methionine, where I will discuss its properties and explain how it can and should be used in sports.

Many amino acids are synthesized in the liver. However, some cannot be synthesized by the body. L-methionine is one of them. This is why we must obtain this amino acid externally through food. Methionine is one of the essential amino acids that contains sulfur.

Properties of Methionine

L-methionine is important for the entire body; this substance is involved in the production of immune cells and the functioning of the central nervous system.

Key roles of methionine in the body:

• It serves as a precursor to cysteine and creatine.
• Reduces cholesterol levels and increases glutathione (an antioxidant).
• Participates in the elimination of toxins and heavy metals and helps repair tissues of internal organs. Regulates ammonia levels.
• Displays lipotropic properties (prevents fat deposition), lowering fat levels not only in the liver but throughout the body.
• Increases overall body tone and promotes quicker recovery after physical exertion.
• Supports hair growth.
• Additionally, methionine is a powerful antioxidant and plays an active role in maintaining liver health.

Use in Sports

The primary and most important property of methionine for individuals experiencing physical exertion is, of course, the stimulation of the immune system, the manifestation of antioxidant properties, and the prevention of fat deposition. Therefore, if you are a professional athlete or simply a fitness enthusiast, ensure you have adequate L-methionine intake in your body. Taking methionine during a low-carbohydrate diet (“cutting”) can be beneficial due to the properties mentioned above. L-methionine does not possess strong anabolic properties, but it is included in all protein blends.

Content in Foods

Methionine is found in most protein-rich foods, such as:

• Lean meats,
• Cottage cheese,
• Legumes,
• Peanuts.

The level of methionine in animal products is 5-10 times higher than in vegetables. A great source of this amino acid is casein.

Dosages and Contraindications

1000 mg per day is sufficient for normal replenishment of L-methionine during active sports. Dosages up to 1250 mg per day are also acceptable. This dosage depends on your dietary intake, so if you decide to increase your daily dose, it is advisable to consult a doctor.

Do not take L-methionine additionally if you have heart disease, arthritis, or if you frequently consume meat. This is because methionine can be converted into homocysteine (an amino acid) that may exacerbate conditions related to the heart. L-methionine is not recommended for pregnant women. Like folic acid, it can affect part of the embryo (the neural tube), which forms its nervous system.

Methionine as Sports Nutrition

Some manufacturers release methionine as a standalone amino acid. For example:

• NOW L-methionine 500MG
• Twinlab L-methionine

Personal Fitness Training by the Author of This Article:

• Development of online training and nutrition programs;
• Weight loss and correction;
• Muscle mass gain;
• Physical rehabilitation for various conditions (including back issues);
• Rehabilitation after injuries;
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