Collagen comes from animal products, usually beef connective tissues.
It is essential in the formation of strong muscle, tendon, ligaments, skin, nails, and hair. The lack of collagen causes the skin to hang, wrinkles to form, nails to break. A general body weakness develops simply because the body can't reapair itself properly. Now that we have collagen, let's find out how the body does the work. Almost all body repair takes place during the Alpha phase of the brain's sleep cycle - the first few hours of sleep.