Thousands of “collagens” on the market are usually hydrolyzates composed of amino acids, which are in our opinion, “post-collagen” proteins. They are not collagen any longer, they merely contain amino acids typical to collagen tissues. Polish collagen extracted directly from the fish skin is a tertiary collagen, a stage before it develops into collagen fibrils and then fibres. This unique Polish method of triple helix collagen extraction and preservation is not used in any other part of the world. However, consumers tend not to know what exactly a hydrolyzate is and how and why it is different from a hydrate.