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Lysine is an essential basic amino acid. Due to the low content of lysine in cereal foods and its susceptibility to destruction and deficiency during processing, it is called restrictive amino acid.
Lysine can regulate the metabolic balance of the human body. Lysine provides structural components for the synthesis of carnitine, which promotes the synthesis of fatty acids in cells. Adding a small amount of lysine to food can stimulate the secretion of gastric protease and stomach acid, improve the secretion of stomach acid, enhance appetite, and promote the growth and development of young children. Lysine can also increase calcium absorption and accumulation in the body, accelerating bone growth. Lack of lysine can lead to insufficient secretion of gastric juice, resulting in anorexia, nutritional anemia, central nervous system obstruction, and developmental disorders.
Lysine can also be used as an adjuvant diuretic in medicine to treat lead poisoning caused by reduced chloride levels in the blood. It can also form salts with acidic drugs (such as salicylic acid) to alleviate adverse reactions, and when combined with methionine, it can inhibit severe hypertension.
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Collagen production
Collagen is responsible for the formation of cartilage, bone, and connective tissue. Lysine contributes to the formation of cartilage and collagen. Calcium and collagen work together to prevent bone loss. In a diet with low lysine content, the formation of calcium and collagen will slow down. This is one of the reasons why many people who lack lysine have fragile bones.
Adding lysine to the diet
Many foods have particularly high levels of lysine, such as beef, fish, lamb, turkey, and chicken. Animal based foods generally contain a large amount of all essential amino acids, which are components of proteins. Vegetarians may find it difficult to obtain lysine from their diet, but Parmesan cheese and eggs are good choices. Tofu, roasted soybeans, and pumpkin seeds also contain lysine, but their bioavailability is halved.
Does lysine need additional supplementation?
Foods rich in lysine have extremely high levels of lysine in protein rich foods such as meat, fish, other seafood, dairy products, soybeans, nuts, and seeds. Typically, a protein rich diet can meet the body's daily requirement for lysine (approximately 2.5 grams per day). Supplementing with L-lysine alone is not enough in a diet with insufficient L-lysine content.
Proper supplementation of lysine is essential for the human body. Lysine deficient individuals may experience symptoms such as fatigue, weakness, nausea, vomiting, dizziness, loss of appetite, developmental delay, anemia, etc. They can supplement with lysine under the guidance of a doctor. The recommended daily intake of lysine for adults is around 3g-9g. However, due to the presence of lysine in the food we usually eat, the need for additional supplementation varies from person to person.