Tract. ♦ In chemical digestion, proteins are broken down into amino acids, starch is broken down into sugar, and fat is broken down into fatty acids and glycerol. All these are simpler organic compounds that get easily absorbed into the bloodstream. Super Flora Probiotics conversions are essentially chemical reactions in which the serve as biological catalysts, meaning they accelerate the rate at which the reaction occurs.It is essentially a physical process that prepares the food for chemical digestion. If the food is not chewed properly or simply gobbled, it can cause obstruction and may even choke the esophagus. Simply breaking down the food, physically, in mechanical digestion is not enough to promote its absorption. .