Collagen can be classified into different types, with the most common being types I, II, and III. Each plays a specific role in the body: type I, the most abundant, is found in the skin, tendons, and bones; type II is mainly present in cartilage; and type III contributes to the structure of muscles, organs, and blood vessel walls.
However, when collagen is hydrolyzed, it is broken down into small peptides, making it easier for the body to absorb. This hydrolysis process reduces the distinctions between collagen types, as once absorbed, these peptides are used globally by the body, regardless of their origin.
The classification by type is mainly useful to understand the source of the collagen. What truly matters is not just the type of collagen, but more importantly, the quality of the hydrolysate, its molecular weight, and its bioavailability, which determine its effectiveness and benefits for the skin and connective tissues.