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Generally halal
E951 (Aspartame) is a synthetic high-intensity sweetener with no animal origin, so it is generally considered halal at the ingredient level.
Aspartame is a low-calorie sweetener about 200 times sweeter than sugar, used in diet drinks, sugar-free gum and tabletop sweeteners. It is made by joining two amino acids (aspartic acid and phenylalanine) and is manufactured synthetically.
Produced by chemical/enzymatic synthesis combining aspartic acid and phenylalanine (as a methyl ester). Commercial production is not animal-based.
Aspartame is generally classified as halal because it is synthesised and contains no prohibited animal or alcohol component. As with any additive, a finished product still needs its own verification.
It may be found in — this does not mean every product below contains it.
AspartameE951Sweetener (E951)Contains a source of phenylalanineINS number: 951
Ingredient guidance is not certification. Verify the finished product on the MUIS HalalSG register or with the manufacturer.
Check MUIS HalalSGSources: EFSA, IARC & JECFA, FAO/WHO, MUIS · Last reviewed: July 2026 · This guidance is not certification.
Halal does not automatically mean healthy, and a health concern does not automatically make an ingredient haram.
Halal does not automatically mean healthy, and a health concern does not automatically make an ingredient haram. Aspartame must carry a warning for people with the genetic condition phenylketonuria (PKU) because it contains phenylalanine. In 2023 the WHO's cancer agency (IARC) classified aspartame as 'possibly carcinogenic to humans' (Group 2B), while the JECFA expert committee reaffirmed the acceptable daily intake of 40 mg per kg of body weight. These are food-safety assessments, separate from halal status.
Permitted as a sweetener in the EU, UK, US and many other markets within an established acceptable daily intake. Products must declare that it is a source of phenylalanine.
Yes — aspartame is a synthetic sweetener with no animal origin, so it is generally considered halal at the ingredient level. The finished product still needs verification.
No. It is manufactured synthetically from two amino acids.
Regulators permit it within a set daily intake. It carries a PKU warning (contains phenylalanine), and IARC classifies it as 'possibly carcinogenic (Group 2B)' while JECFA kept the acceptable daily intake unchanged. This is a health question, separate from halal status.
'Aspartame', 'E951' or a 'contains a source of phenylalanine' statement.
Humble Halal methodology: we classify additives by their common origin, not by any specific product. A generally-halal ingredient does not make a finished product halal-certified. This page is general guidance, not certification or religious/legal advice — always verify the complete product. Last reviewed July 2026.