Ingredient Index · E951
Is Aspartame banned in Europe?
No: aspartame is authorized in both the EU and the US at comparable intake limits; the 2023 IARC "possibly carcinogenic" classification made headlines but changed no regulation on either side.
What the EU does
Authorized. Aspartame (E951) is a permitted sweetener under Regulation (EC) No 1333/2008 with maximum levels per food category and an EFSA-set acceptable daily intake of 40 mg per kilogram of body weight. EFSA's 2013 full re-evaluation (one of the most thorough reviews ever conducted on a food additive) concluded it is safe at current exposure levels.
One genuine EU labeling rule: any product containing aspartame must state that it "contains a source of phenylalanine," because people with the rare genetic condition phenylketonuria (PKU) cannot metabolize it.
Citation Regulation (EC) No 1333/2008, Annex II (E951); EFSA Journal 2013;11(12):3496
What the US does
Authorized since 1981 under 21 CFR 172.804, with an FDA acceptable daily intake of 50 mg per kilogram of body weight, slightly higher than the EU's, but both are far above what even heavy diet-soda drinkers consume. The same PKU warning is required on US labels.
In July 2023, IARC classified aspartame as Group 2B, "possibly carcinogenic to humans," based on limited evidence: the same category as aloe vera and pickled vegetables. WHO's food-additive committee (JECFA), EFSA, and the FDA all reviewed the same data and kept their intake limits unchanged. The classification describes evidence strength, not risk size.
Citation 21 CFR 172.804 (aspartame); FDA/JECFA ADI 50 / 40 mg/kg bw
Products that commonly contain it
Aspartame is the legacy intense sweetener. It appears in:
- Diet Coke and many diet sodas
- Sugar-free chewing gum
- Light and low-calorie yogurts
- Tabletop sweetener packets (Equal)
- Sugar-free gelatin and pudding mixes
- Some chewable vitamins and medicines
What to look for on a label
Both jurisdictions require clear declaration:
- "Aspartame" in the ingredient list, or "E951" on EU labels
- The "contains a source of phenylalanine" warning, required on both sides of the Atlantic
- "With sweetener(s)" qualifiers in EU product names
- Newer "zero" formulations often blend or replace it with acesulfame K or sucralose
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Frequently asked questions
Is aspartame banned in Europe?
No. It is authorized under Regulation (EC) No 1333/2008 with an EFSA acceptable daily intake of 40 mg/kg body weight, reaffirmed by a full re-evaluation in 2013.
Didn't the WHO say aspartame causes cancer?
Not quite. In 2023 IARC classified it "possibly carcinogenic" (Group 2B) based on limited evidence, while WHO's own additive committee simultaneously kept the intake limit unchanged. No regulator in the EU or US altered aspartame's status.
How much aspartame is safe to consume?
EFSA's limit is 40 mg/kg of body weight per day; the FDA's is 50. For a 70 kg adult, that is roughly 9 to 14 cans of diet soda every day, sustained over a lifetime.
Why does aspartame carry a phenylalanine warning?
Aspartame is metabolized to phenylalanine, which people with phenylketonuria (PKU), a rare inherited disorder, cannot process. The warning is for them; it does not signal risk for the general population.
Related ingredients
Related reading
Primary sources
- EFSA: Scientific opinion on the re-evaluation of aspartame (E951), 2013
- 21 CFR 172.804, Aspartame (eCFR)
- WHO: Aspartame hazard and risk assessment results (July 2023)
Last reviewed June 10, 2026 · How we assign statuses