L-lysine Hydrochloride

L-lysine hydrochloride is the salt form of lysine, an essential amino acid. Amino acids are the building blocks of protein. It is typically produced through fermentation using microorganisms, followed by chemical synthesis and purification.

Manufacturers add L-lysine hydrochloride to foods as a nutritional supplement to increase protein content. It is often found in fortified foods like protein powders, meal replacement drinks, and some cereals.

In the U.S., L-lysine hydrochloride is generally recognized as safe (GRAS) by the FDA when used as a nutrient. The Joint FAO/WHO Expert Committee on Food Additives (JECFA) has evaluated lysine and established an acceptable daily intake. Research suggests lysine plays a role in protein synthesis and calcium absorption, but high doses may cause digestive upset.