[header] How to avoid aspartame [title] Check the labels of processed foods. [step] On the back of your food products, read the ingredients or " inactive ingredients " section. It is a small section underneath the " nutrition facts " section. 
If you see either the word " aspartame " or " phenylalanine " then the product contains aspartame. Some products even have a warning that indicates people with phenylketonuria (pku) should avoid the product.