Abstract: Food supplement compositions and their methods of use in increasing lean mass and/or muscle size and/or strength in individuals, particularly, athletes is described. The food supplements described comprise a substance which increases nitric oxide production in the body, and, a source of amino acids. Other food supplements described comprise a substance which can enhance and/or mimic insulin activity, and a source of amino acids. The food supplement compositions described are suitable for supplementing the diet of an athlete and particularly for enhancing an athlete's muscle size or strength.

Abstract: Food supplement compositions comprise lipoic acid or a derivative thereof and creatine or a derivative thereof. The compositions optionally, but preferably, further comprise dextrose. The food supplement compositions are suitable for supplementing the diet of an athlete and particularly for enhancing an athlete's muscle size or strength.