The top bodybuilding supplements used by the best athletes are Whey protein shakes, creatine monohydrate, L-Glutamine, prohormones and a vitamin/mineral supplement.
Other nutritional products designed to keep you healthy and looking great are meal replacement shakes, nutritional bars and low carb snacks.
These items are merely scratching the surface of the many complex layers of healthy nutrition and supplementation for bodybuilders, but it certainly gives you a head start!