I am 50 year old male with arthritis of the knees. After a skiing accident and and years of an active lifestyle that included marathon running and triathlons, finally that lifestyle caught up with me and I found myself unable to enjoy being active. BUT that has all been solved thanks to REPARAGEN which gave me my lifestyle back! Wow it is great to be able to do what I want to do and not worry about my joint pain. Forget glucosamine finally something that works for me.