Chondroitin can repair cartilage to exacerbate the cartilage flexibility! Chondroitin sulfate is an eye drop that can be used to dry eyes. In addition, it is used in cataract surgery to preserve the cornea during keratoplasty. This is the FDA's approval of these uses. Chondroitin Sulfate B is an ingredient in the dermis of the skin that helps to keep the skin viscoelastic. Chondroitin sulfate is a natural chondrocyte derived from animal origin. It is also important that absorption of chondroitin sulfate takes some time.