Hyaluronic acid injections (Hyalgan, Synvisc, Supart) are made from rooster combs. They are used to treat osteoarthritis of the knee. They cannot repair torn cartilage, though.
About Joan Bathon, M.D.
Dr. Bathon was a Co-Deputy Director of the Division of Rheumatology at Hopkins Bayview. She was also the founder and director of the Hopkins Arthritis Center.