I sell this product to horse people.
For what it is worth:

I have been using Lubrisyn for some time now and it has made a big difference in my hip.
When I went to the doctor I had a 5-minute diagnosis that started with "So, your hip hurts" and ended in an injection. The injection worked for about a week then the pain was back and my right foot was going numb again.
The story:
At a horse show there was a booth for Lubrisyn so I talked to they guy, a retired or broken however you want to look at it, bull rider who said that although the product is marketed for horses if he didn't take his tsp each night he couldn't get out of bed in the morning. I bought it, thinking that if it worked for him maybe it would help my hip. The hip is pain free unless I over extend it or fall on it
To sum up, it has helped in that I have a working hip and the side effect is that I have softer skin (and a cute little whinny and I can count by stomping my feet ).

Lubrisyn is made from a microbial source rather than shark fin or rooster comb from which most of the products on the market now are made. It also has a high molecular weight so it absorbs into your system before it hits your stomach, which means that you get all of it rather than what is left over after digestion. It's a substance naturally produced in your system so if you take too much your body just reabsorbs it and passes it out.

The web site is:
www.lubrisyn.com
the phone number is:
800-901-8498
You receive 20% off if you tell them I told you to call.

I sell other stuff too but y'all probably don't need hoof dressing, even though it does give you nice strong nails.