Aspartame

Dipeptide Sweetener (aspartyl Phenylalanine Methyl Ester)Rx: OtcCompound: Approved

Also known as: APM, Canderel, E951, Equal, L-aspartyl-L-phenylalanine methyl ester, NutraSweet

Educational Only — Not medical advice. Consult a qualified clinician before using any peptide.

Summary

Aspartame is a low-calorie artificial sweetener composed of the amino acids aspartic acid and phenylalanine as a methyl ester. It is approximately 200 times sweeter than sucrose and is widely used as a food additive. It is not a therapeutic peptide but is classified as a dipeptide derivative. It is contraindicated in phenylketonuria (PKU) due to phenylalanine content.

Mechanism of Action

Binds to sweet taste receptors (T1R2/T1R3 heterodimer) on taste buds, activating the gustatory sweet signal pathway; metabolized to aspartate, phenylalanine, and methanol upon ingestion

Routes of Administration

Oral

Goals & Uses

  • Blood glucose control in diabetesMetabolicModerate
  • Caloric reduction / weight managementMetabolicModerate

Contraindications

  • Phenylketonuria (PKU)Metabolic DisorderHigh
  • Hypersensitivity to aspartame or phenylalanineAllergy/ImmunologyHigh

Adverse Effects

  • Methanol productionMetabolicCommon
  • HeadacheNeurologicUncommonPain in the head or upper neck
  • Gastrointestinal discomfortGastrointestinalUncommon
  • Phenylalanine accumulationMetabolicRare
  • Possible carcinogenicityOncologicalUnknown

Drug Interactions

  • LevodopaLow

Population Constraints

  • Pregnant women with PKUPregnancyAbsolute
  • Infants and young children with PKUPediatricAbsolute
  • Pregnancy (general population)PregnancyRelative

Regulatory Status

  • European UnionApprovedApproved: Food additive E951EFSA approved; ADI 40 mg/kg/day; IARC 2023 review noted but ADI not changed by EFSA
  • United StatesApprovedApproved: Food additive (sweetener)FDA approved 1981; ADI 50 mg/kg/day (US); GRAS status for various food categories
  • United KingdomApprovedApproved: Food additive E951Retained post-Brexit under UK food additive regulations; same ADI as EU

Approved as a food additive by the US FDA (1981) and European Food Safety Authority (EFSA). IARC classified aspartame as 'possibly carcinogenic to humans' (Group 2B) in 2023, though JECFA reaffirmed the ADI of 40 mg/kg/day. Mandatory labeling required for PKU warning in many jurisdictions.

Evidence & Sources

No sources recorded yet.

Browse All PeptidesBuild My Stack