Breakdown of the food stuffs

The fats, proteins, and carbohydrates (starches and sugars) in foods are made up of very complex molecules and must be digested, or broken down. When digestion is completed, starches and complex sugars are broken down into simple sugars, fats are digested to fatty acids and glycerol, and proteins are digested to amino acids and peptides. Simple sugars, fatty acids and glycerol, and amino acids and peptides are the digested foods that can be absorbed into the bloodstream. Foods such as vitamins, minerals, and water do not need to be digested.