What You Should Know
L-Lysine is an essential amino acid that is used as a building block for protein in the body. The body does not synthesize L-Lysine and thus food sources are needed for healthy living and energy production. Common food sources include red meat, spinach, buckwheat and eggs. Soybeans also provide a good source of L-Lysine. Some supplement manufacturers include L-Lysine in their weight loss and fitness supplements and market the ingredient for increased muscle building and decreased recovery time between workouts.
List of Ingredients
L-Lysine – essential amino acid.
The average person should consume between 1 and 1.5 grams of L-Lysine every day. L-Lysine deficiency is rare and is often associated with some sort of inability to digest protein or a strictly vegan lifestyle. Each serving of meat contains about 2 grams of L-Lysine and thus more than the recommended daily amount. L-Arginine does compete with L-Lysine for absorption so consumption of too much L-Arginine can affect L-Lysine levels in the body, but not often enough to cause deficiency.
Toxicity seems to me more likely than deficiency. According to the Journal of the American College of Nutrition, up to 3 grams of L-Lysine may be taken in addition to the L-Lysine absorbed with food without toxic effects. Above that amount and there is question whether the essential amino acid is safe. L-Lysine aids in the absorption of calcium, muscle growth, muscle recovery after injury or repair, and the production of enzymes, hormones and antibodies.
L-Lysine can be purchased as part of a weight loss or fitness supplement or as a standalone supplement. The price of L-Lysine is about $7.50 per 60 tablet bottle of 1000 mg. One gram is equivalent to 1000 mg. There is no evidence that L-Lysine will increase muscle size, weight loss or fat burn.
- L-Lysine is essential for healthy muscle growth and repair.
- Many supplement companies sell the product for a fraction of the price of other fitness supplements.
- In depth, scientific information can be found on the function of L-Lysine in the body.
- L-Lysine will not affect weight loss.
- Increased muscle size is not a side effect of taking more L-Lysine.
- Most people, even vegetarians and some vegans, consume enough L-Lysine in the diet.
- Too much L-Lysine can lead to toxicity.
There is no reason to supplement a typical diet with more L-Lysine. This essential nutrient is easy to come buy naturally with an average of two grams being consumed with every serving of meat. One serving size of meat is about the size of a deck of cards. While consuming too much L-Lysine can be a problem, there are few known cases of L-Lysine deficiency. Increased fat burn and calorie burn will not occur when taking this amino acid.