Aspartame is made from two amino acids, parts of protein which occur widely in our diet.
The two amino acids in aspartame are aspartic acid and phenylalanine. Phenylalanine is an essential amino acid, which means that we need to obtain it from our diet in order to remain healthy. Our bodies produce aspartic acid. Phenylalanine and aspartic acid are found in eggs, meat, cheese, fish, cereals, fruit and milk. When we consume aspartame, it is broken down in the digestive system to very small quantities of common dietary components. Aspartame does not, therefore, bring anything new to our diet.