The basic idea behind nutrition must be understood in order to have a healthy diet. You’ll hear a lot of talk about carbs, proteins, and fats, but what does it all mean? For starters, a couple kinds of carbs exist. Sugars are known as simple carbohydrates. Complex carbohydrates are storage units for glucose. Your digestive system breaks the starch down and releases the glucose into the bloodstream. All carbohydrates should not be completely avoided, as these give your body needed energy.