Acetar Bio-Tech is a professional manufacturer in China, Resveratrol is our main product, the spec is 50% to 98%,If you are interested in the product,please don't hesitate to contact with me,I will glad to cooperate with you and offer the best product with the bottom price to you. plant origin: Polygonum cuspidatum Sieb.Et Zucc. Appearance: Yellowish or white powder Synonyms: 3,4`,5-Trihydroxystilbene Molecular Formula: C14H12O3 Specification: (HPLC)≥20%,50%,80%,98% Clinical practice: Used in the acute jaundice type infective hepatitis, blood silt and menorrhoea, rheumatism type arthralgia , muscle bone-ache , sand drench , blood drenching , bronchitis , damp and hot gall stone; It is too high to be used in the cholesterolemia and triglyceride; It is anti-oxidant to be used in , slowed aging. Pharmacology function: Antibiotic antivirus , antitumor , resists the hepatitis , suppresses the agglutinate production with plain B2 of thrombus of blood platelet . It can prevent low density fat albumen from oxidize , have potential prevention and cure cardiovascular disease , gives protection against cancer , antivirus and immune regulating action , its function is shown as its anti-oxidant characteristic mainly.