Our body consists to a large extent of water and proteins. Collagen is the most abundant protein in the human body and plays a major role in healthy bones, cartilage, teeth, hair and skin. For example, in the middle skin layer the individual fibers of the collagen link together to form a widely branched framework that maintains the elasticity of the epidermis. The more of these strands ‚support‘ our skin, the tighter it is.