Dear customer, Kinohimitsu products uses Marine Collagen Peptide, which is extracted from Salmon Fish Scales. Marine collagen is in smaller molecular size, thus can be absorbed better by our body. There are 3 main types of collagen, Type 1, 2 and 3. Type 1 collagen is good for skin, hairs and nails; Type 2 is good for joints and cartilages; whereas Type 3 is mainly for the bones and joints. Kinohimitsu Marine Collagen contains both Type 1 and 3 collagen which can give a wider maintenance for skin, hairs, nails, joints and bones.
Hope this clarifies!