There are two types, complex and simple.
Complex carbohydrates are more nutrient dense than simple.
Meaning they have significant amounts of vitamins and minerals. Both types of carbohydrate are digested by the body into glucose before they can be used as fuel. Energy during heavy exercise such as weight lifting and sprinting is derived primarily from blood glucose and glycogen stores. 52 Cal. and 1 Tsp. Proteins are broken down by the body into amino acids and later rebuilt into proteins used in growth and repair of muscle and other tissues.