| CYSTEINE-CYSTINE These two amino acids are closely related; each molecule of cystine consists of two molecules of cysteine joined together. Cysteine is very unstable and is easily converted to L-cystine; however, each form is capable of converting into the other as needed. This amino acid is formed from L-methionine in the body. Vitamin B6, vitamin12 and folate are necessary for cysteine synthesis, which may not take place as it should in the presence of chronic disease. Main Functions: • Cysteine and Cystine are interconvertible. Two molecules of Cysteine make Cystine. • Antioxidant. Protective against radiation, pollution, ultra-violet light and other causes of increased free radical production. • It is also found in a variety of other proteins in the body, including several of the digestive enzymes. • Cystine or the N-acetyl form of cysteine (NAC) may be used in place of L-cysteine. NAC aids in preventing side effects from chemotherapy and radiation therapy. Because it increases glutathione levels in the lungs, kidneys, liver, and bone marrow, it has an anti aging effect on the body-reducing the accumulation of age spots, for example. • Natural detoxifier. Cysteine helps to detoxify harmful toxins and protect the body from radiation damage. • Essential in growth, maintenance, and repair of skin. Key ingredient in hair. • One of the 3 main sulfur-containing amino acids, along with Taurine and Methionine.
Cysteine/Cystine Deficiency: |