Collagen is a natural substance inherent to the skin.
It is also found in muscles, tendons and bones.
Collagen is lost over time, and this results in facial lines and generally less firm skin.
Injectable Bovine Collagen
This collagen may be injected into human skin to re-form a network of collagen fibers. Although sourced from cows, it is purified and sterilized, and the body will typically accept it as its own.
There are other forms of animal collagen used in facial rejuvenation, however bovine collagen is the most popular.
Brands of Injectable Bovine Collagen used in Facial Rejuvenation
Each is available in a range of concentrations.