... free to contact Nutrition Biotechnology Co.,Ltd.Vitamin C Collagen Main ingredients: Vitamin C, collagen powder. Anti-aging, Whitening ... 5000mg of collagen, the molecular weight 1500-3000Da, Vitamin C. compared to other collagen drinks, fast absorbing, ... without preservatives, coloring agents, perfumes, low denaturation temperature,d. CARTILAGE: collagen is vital for strengthening blood vessels and ...