Hydrolyzed collagen
“The study involved 112 women between the ages of 39 and 59 years who were assigned to take a placebo (500 milligrams of cellulose) or a commercial product (containing 300 milligrams of hydrolyzed type II collagen, 100 milligrams of chondroitin sulfate, and 50 milligrams of hyaluronic acid) twice a day for 12 weeks.”