Digestive Enzymes. No matter what specific foods we eat, our diets are composed of protein, fat and carbohydrates. Digestive enzymes break down protein, carbohydrates and fats into progressively smaller components. Enzyme supplements normally contain amylase, protease and lipase. Cellulase, lactase, malt diastase, invertase (sucrase), glucoamylase, bromelain and papain may also be included in digestive products. These enzymes increase the level of digestion in the stomach, increasing the amount of food broken down.
Still, you'd be surprised at how much you can safely discard. Here is what you should keep and how long you should keep it. Three Years. Keep your federal and state income tax returns and related receipts and statements for at least three years.
The Three Year Rule. You should keep tax returns for three years from the date you filed or three years from the due date. The reason is linked to the IRS statute of limitations. The IRS has the right to review (audit) all tax returns for three years.