Bonnie Trafelet/Chicago Tribune
Vitamin D helps the body absorb calcium and is important for normal development, healthy teeth and strong bones.
Vitamin E helps keep a healthy immune system, protects the body from free radical damage during an intense workout. It also helps keep a healthy heart and prostate, and supports lung and digestive tract functions.
Riboflavin and B-12 vitamins help carbohydrate metabolism and energy production.
Iron helps regulation of cell growth and oxygen delivery.
Magnesium helps build bones and maintain teeth. It's also helpful for protein synthesis, muscle function, nerve function and energy production.
Niacin helps DNA replication and repair, and energy metabolism.
Protein helps support muscles and can reduce the feeling of hunger in comparison to carbohydrates and fats.