The brands that have been put on shelves in Japanese drugstores are Mairumen, Noguchi and Ou Li Joy in turn. Firstly, the amino sugar content of their three products is 1500mg, followed by shark chondroitin used by Maruman and Noguchi, but the content of Maruman is 150mg. All three products contain collagen, and Maruman not only has high content, but also uses fish collagen peptide.