I bought slide for myself and for some of my horses. I am reserving my opinion for the supplements for myself as it is early days, but I stopped taking a previous supplement and things started to hurt again. I will wait till I use it more. As for the horses, it seems to have helped my older broodmare right away, but I give it to my 8 year old ranch gelding and 2 year old reining filly, preventatively; so I will wait and see.