Yeah the knees just keep getting better so it's actually an anti-aging product and that's the way Purity Products talked about it and they have all kinds of clinical trials and studies to confirm their findings. It's taken some months to get to this point though so don't expect instant miracles.
I assume that if you want the best you should go with Purity Products even though Vitacost.com had the exact same formula...but I don't know about the quality of the ingredients with vitacost. I was going to try Purity if vitacost didn't work but it has worked amazingly well obviously.
I never thought about neck injuries in connection with truck driving but I can see that now. Man, you gotta wrap up that career.