Getting into that octagon ring and defeating your opponent is not easy, but it is more difficult to cut down and get the shape that promises to boost both your strength and agility. While a number of supplements exist claiming to have formulated a miracle with secret ingredients, the lack of transparency and scientific evidence just make them unworthy of trust, let alone a trial. Also, the majority of these products starve you to help you lose weight, which is not conducive for fighters or boxers.