Profile: Xian Chukang Biotechnology Co., Ltd. specializes in providing pharmaceutical intermediates. Our pharmaceutical intermediates include melatonin, haluronic acid, indole 3 carbinol, aniracetam, l-serine, vanillic acid, pregnenolone, chondroitin sulfate, l-carnosine, and 3,3'-diindolylmethane. Melatonin is a white crystal or white crystalline powdwer. It protects cells from free-radical damage, boost the immune system, prevents cancer and extends life. Indole-3-carbinol and its main metabolite diindoylmethane modulates several nuclear transcription factors resulting in a variety of biological and biochemical effects. It works as a strong antioxidant, thereby protecting the DNA and other cell structures. It stimulates the production of detoxifying enzymes. pregnenolone is a white or almost white crystalline powder. It is used in the synthesis of steroid drug intermediate. chondroitin sulfate is an glycosaminoglycan extracted from bovine and shark cartilage. It is used for the auxiliary treatment of neural-headache, neuralgia, arthritis and hemicrania. It is effective in reducing the blood lipid.