My totally unscientific study. I'm 45, almost 46 and getting a bit creaky, but insist on continuing my high impact activities, such as Zumba, running, Turbo Fire... Without it, I have annoying aches - not bad enough to be pain, but enough to keep some of my high impact from being attainable. I started taking it, just to see and 3 weeks later, my knees are more stable, my ankles don't bother me (I tend to suffer from Achilles tendon) and feet are happy. Seriously, I love the stuff. I feel like I lost 10 years off my age. So, to me it's worth it. But like every thing else Your Mileage May Vary.
Christine
Life is not measured by the number of breaths we take, but by the moments that take our breath away.
Cycle! It's Good for the Wattle; it's good for the can!