Posted by iHerb Customer on November 20 2017 | Verified Purchase
I have been using collagen hydrolysate for over 2 years now, and so far I don't have problems with my knees. I am a gym rat, do spinning, take cardio and total toning classes, zumba and strong by zumba, etc. I do hiking too and mind you, I am 58 years old. So, I know this product is helping me a lot with my joints.