CARBS is an acronym for carbohydrates, which are a type of macronutrient found in many foods. STARCH is a type of carbohydrate that is composed of long chains of glucose molecules and is found in many grains, such as wheat, corn, and rice. It is also found in potatoes, beans, and other starchy vegetables. STARCH is an important source of energy for the body and is broken down into glucose during digestion.