NB

Collagen is used widely in cosmetic surgery and as wound healing aids in burn patients. These are used widely for reconstruction of bone and a wide variety of dental, orthopedic and surgical purposes.
Most of the medical collagen used is young beef cattle (bovine) from certified BSE (Bovine spongiform encephalopathy) free animals. Donor animals are from "closed herds", or from countries which have never had a reported case of BSE such as Australia, Brazil and New Zealand.
Another commonly used tissue is porcine (pig) tissue. This is used for producing collagen sheet for a variety of surgical purposes. In some patients, the patient's own fat, hyaluronic acid or polyacrylamide gel are also used.
Collagen is used as sheets, dermal filler etc. in cosmetic procedures. Although it cannot be absorbed through the skin, collagen is now being used as a main ingredient for some cosmetic makeup.