Collagen (collagen hydrolysate) is a complex structural protein that maintains strength and flexibility of skin, ligaments, bones, joints, muscles, tendons, gums, teeth, eyes, blood vessels, nails, and hair. Collagen provides building materials for growth and maintenance of a healthy body. When Collagen is taken internally, the body receives the raw materials it needs to supplement the collagen found in all of these areas.

Articles:

http://en.wikipedia.org/wiki/Collagen

http://en.wikipedia.org/wiki/Collagen,_type_I,_alpha_1

http://en.wikipedia.org/wiki/Collagen,_type_II,_alpha_1

http://en.wikipedia.org/wiki/Collagen,_type_III,_alpha_1