There are more than 29 known types of vital collagen, which are named as type I, type II, type III and so on. Nine of them are present in the skin, and each plays an important role. The role of all 29 vital collagens is not yet clear.
The most widely known is type I collagen, which is mainly found in the skin and is associated with elasticity and strength. Type I collagen is the most abundant and well-studied collagen, accounting for about 90% of the total body collagen.
There are various types of vital collagen, including fibrous collagen, membranous collagen, collagen that connects the dermis and epidermis, collagen that regulates the thickness of fibers, and collagen that forms bead-like fibers.

Among the nine types of vital collagen in the skin, three types of collagen, type I, type IV and type VII, are necessary to maintain skin toughness and elasticity. Collagen Type IV and Type VII exist in what is called the basement membrane, which is near the membrane at the border of the epidermis and dermis, and must exist in the correct structure in order to obtain beautiful skin that is resilient and elastic.
Vital collagen in the body decreases with age, and the body's power to produce new collagen also weakens. There have been many studies so far on supplementing the collagen lost every day with fillers and foods, and now the ability to generate new collagen is attracting attention.