I've suffered from a bad knee most of my life. If it isn't bone on bone, it sure feels like it. While nothing really helps, when I do not drink plenty of water, the pain and swelling get real bad when I stand or walk for any duration. Have been taking ACV/bs for 2 weeks now and so far no relief. But it is working on my Blood Pressure so I'll keep taking that. I just need a new knee.