The two brand name formulas I purchased are Flex-a-min and Osteo Bi-Flex, they both have:

Glucosamine/Chondroitin
MSM
Bosweilla Serratta Root
Hyaluronic Acid

I'm telling you guys my right knee went from feeling like it need a replacement to feeling normal within 5-7 days of starting on this formula, and I was on pretty big doses of Glucosamine/Chondroitin up until that point. And my knee has remained fine, despite pretty high miles (200-250/week) and hammering since then over the past month. I hope it continues.