Cystine is a nonessential amino acid that's made up of two cysteine molecules joined by a disulfide bond. It's a white solid that's not very soluble in water.
Function
Protein structure: Cystine helps stabilize proteins by forming disulfide bonds that connect polypeptide chains.
Redox reactions: Cystine's thiols can undergo redox reactions, giving it antioxidant properties.
Vitamin B6 utilization: Cystine is necessary for the body to use vitamin B6 properly.
Wound healing: Cystine can help wounds and burns heal.
Mucus breakdown: Cystine can help break down mucus in illnesses like cystic fibrosis and bronchitis.
Glutathione synthesis: Cystine helps the body produce glutathione, which may have anti-aging effects.