I tried it twice. First time didn't notice much but tried it again after I got hooked up with my buddies left overs. He quit lifting cause of an injury and I got to get the rest of his. Would NEVER NEVER spend the money on it again. It's a pack of 7 different vitamins and my urine was so bright fluorescent from waste it was ridiculous. Your buddy may get something out of it but it would be mental, absolutely nothing from the Animal Pak itself.