Not sure yet , I haven't seen a different.

It works helps my 15 year old cat

Works for a twenty year old cat. She has no problems reaching her litter box in the basement.

Got this for my baby boy he’s going on16. I believe it helps!!

This help my 14 year old cat jump around and keeps her back from slumping. Great price.

Head helps my cats with back aches if you do what the directions say

15 year old cat feels much better with this supplement! Thanks Cosequin!

Worth a try for a kitty with a limp

This works great! Our cat loves it.

Only been using a week and I see a difference in my cat already