Lcystine

Lcystine, also known as L-cystine, is a non-essential amino acid. It is a dimeric form of cysteine, meaning it is composed of two cysteine molecules linked together by a disulfide bond. Cysteine is a sulfur-containing amino acid that plays a vital role in protein structure and function. L-cystine is formed in the body through the oxidation of cysteine.

This amino acid is found in many protein-rich foods, including meat, poultry, fish, dairy products, and eggs. It is also present in plant-based sources like legumes and grains. L-cystine contributes to the formation of keratin, a key protein found in hair, skin, and nails. It is also involved in the synthesis of glutathione, a powerful antioxidant that helps protect cells from damage.

While the body can synthesize L-cystine from cysteine, dietary intake can supplement this process. L-cystine supplements are sometimes used for their purported benefits related to hair and nail health, as well as antioxidant support. However, scientific evidence supporting many of these claims is limited. The body typically obtains sufficient amounts of L-cystine through a balanced diet. Further research is ongoing to fully understand the physiological roles and potential therapeutic applications of L-cystine.