Im a 54 yr old male, been taking this along with resveratrol for about 12 months. Take in the morning on an empty stomach and definitely can feel a difference in my morning workouts. I mix collagen with my protein shake after the workout and the combination seems to be helping with my skin around my eyes and my neck. Have also been feeling less inflammation from an old soccer injury after I bike, I eat pretty healthy and take vitamins so it is hard to say exactly what is working. My GF says she thinks my skin looks much healthier , I will definitely keep taking this.