DHC Collagen contains fish based collagen peptide and vitamin B1 and B2. The product helps improve skin quality and maintain moisture in and beauty of skin. Collagen is a type of protein that is combined with amino acid. 70% of original skin is said to be made of collagen. The best time to consume DHC Collagen is in the evening. Recommended dose is up to six tablets per day and it helps digest if taken after meal. Seek advice from doctor if you are pregnant or on regular medication. Do not consume the product if allergic to the ingredients.