It is approved for humans actually. I had a hyaluronic acid injection my for knee injury. I didn't really notice that it did anything though. But I think it'

It is approved for humans actually. I had a hyaluronic acid injection my for knee injury. I didn't really notice that it did anything though. But I think it's generally supposed to help lessen the pain for cartilage damage that isn't a focal defect. Note that it doesn't do anything to improve the cartilage — it just helps the pain.