Collagen is the fibrous structural protein that makes up the white fibers (collagenous fibers) of skin, tendon, bone, cartilage, and all other connective tissues. It is also found dispersed in gels of the body to provide stiffening, such as in the vitreous humour of the eye. In other words, collagen is the natural protein that composes most of the body’s structural support and is the primary substance of connective tissue. It is the fibrous connective tissue that holds our body together. Collagen is present in all multi-cellular organisms.
Collagen gives the different organs and tissues their strength and elastic properties. Twenty-five percent of the dry protein weight of the human body is collagen. Seventy-five percent of our skin is made of it, and in total – some thirty percent of our entire body is collagen. Collagen is part of the natural make-up of tendons, ligaments, joints, muscles, hair, skin, and vital organs.