Has anyone ever used an amino acid concentrate that is made for horses? There are a couple guys at the gym that swear by this stuff. I have used B-12 for horses years ago, but just don't like the thought of using something for a horse. You can get the stuff for dirt cheap. You only use 1oz per 100lbs. One bottle would last a while. I just wonder if anyone has tried anything like this and what everyone thought about it.