Aspartame is only really a concern for people with phenylketonuria, a condition with makes them unable to break down phenylalanine, another byproduct of aspartame in the body. If phenylalanine ...

Since phenylalanine converts to tyrosine ... Studies have used doses of 150 milligrams (mg) per kilogram of body weight (mg/kg) without harmful effects. Some have reported nausea, fatigue, and ...

A pharmacist discusses this non-nutritive sweetener's side effects and safety ... Phenylketonuria occurs when the body cannot ...