It's called Mangosteen juice. I discovered this juice about a year ago and used it myself for my own personal problems and made all of those go away - can go into detail in a PM if you want more info on that.
But recently found out that I can give it to my gelding! He's a 12 year old retired thoroughbred that i've been grooming since he was 2 and got him given to me two years ago - he's my angel but he has a big problem with getting bad inflammation in his legs in the winter as most horses do - but he also has a hard time adjusting to the weather in the winter which means more blankets and trying to keep him as comftorable as possible. I started him on this juice two months ago when we had a really bad cold snap and he has not got stocky on me and he adjusted to the weather nicely . My vet had told me his ciruclation has been 50% better since being on this juice and to keep him on it cause it will only do good for him! I'm so glad I found this juice for myself and my horse!