Aspartame

Absorption	Absorbed in the small intestine, aspartame is metabolized and absorbed very quickly.
Volume of distribution	Not Available
Protein binding	Not Available
Metabolism	Approximately 10% of aspartame (by weight) is broken down into methanol in the small intestine. Most of the methanol is absorbed and quickly converted into formaldehyde. Approximately 50% of aspartame (by weight) is broken down into phenylalanine. Approximately 40% of aspartame (by mass) is broken down into aspartic acid.
Route of elimination	Not Available
Half life	At room temperature, aspartame is most stable at pH 4.3, where its half-life is nearly 300 days. At pH 7 however, its half-life is only a few days.
Clearance	Not Available
Toxicity	Mild gastrointestinal side effects including diarrhea have been reported.
Affected organisms	Humans and other mammals