Aspartame, commonly marketed under the names NutraSweet or Equal, is an artificial sweetener made by combining aspartic acid and phenylalanine. Aspartame, which is 200 times sweeter than table sugar, is used as a sugar substitute in a wide range of commercially produced foods and beverages.
As of 2014, the U.S. Food and Drug Administration acceptable daily intake for aspartame is 50 milligrams per each 1 kilogram of body weight. The FDA claims that over 100 clinical and toxicological studies reviewed by the agency confirm the clear-cut safety of aspartame for human consumption. People who suffer from phenylketonuria, a genetic disorder that doesn't allow the body to break down phenylalanine, are advised to limit or avoid using aspartame.