Potassium Helps your muscles to contract, your nerves to function and to move nutrients into cells and waste products out of cells. You need potassium to avoid cramping when pushing your body hard during cardio workouts that involve your fast-twitch muscle action. Sodium Helps you absorb and retain more of the fluid you take in and this boosts your blood plasma volume. The more blood you have, the less strain on your cardiovascular system as it works to deliver oxygen to your muscles and dissipate heat to cool you down when you’re working out hard Basically, sodium’s pretty important if you want to maintain your performance when it counts. Creatine monohydrate: Creatine's direct role in ATP production means it can drastically improve high-intensity exercise & endurance performance. Creatine improves numerous factors, including strength. Vitamin C Vitamin C is important for connective tissue regeneration. Vitamin C is also important to athletes because, as an antioxidant, it may help to reverse some of the oxidative damage that may occur from exercise. Vitamin B-complex Helps to boost energy by converting glucose Aids in extracting oxygen from fatty acids Plays an important role in oxygen delivery into the muscles.