What is cyclohexylamine and why does it matter?

Gut bacteria in some people convert part of the cyclamate they swallow into cyclohexylamine, a substance that caused testicular effects in rats at high doses. Both the WHO's JECFA (ADI 0-11 mg/kg, 1982) and the EU's Scientific Committee on Food (ADI 7 mg/kg, 2000) based their intake limits on this metabolite, because how much of it a person produces varies widely between individuals.

How do I spot cyclamate on a label?

Look for cyclamate, cyclamic acid, sodium cyclamate, calcium cyclamate, E952 or INS 952 in the ingredients list. It is most common in sweetener tablets, diet and sugar-free drinks, and sugar-free desserts sold in Europe, Latin America and parts of Asia. LabelCop flags it automatically on any label you scan.

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Is cyclamate (E952) safe?

Q: Why is cyclamate banned in the US but allowed in Europe?

The US FDA banned cyclamate from food in 1970 after a 1969 study linked a saccharin-cyclamate mixture to bladder tumours in rats, and upheld the ban in a 1980 Commissioner's Decision. European regulators later reviewed the evidence and kept it permitted: the EU's Scientific Committee on Food set an acceptable daily intake of 7 mg per kg of body weight in 2000, and cyclamate remains an authorised EU sweetener (E952) within limits while EFSA re-evaluates it.

Q: Is cyclamate permitted in India?

Cyclamate is not on FSSAI's list of permitted artificial sweeteners for India — the approved list covers saccharin sodium, aspartame, acesulfame potassium, sucralose, neotame and isomaltulose. FSSAI's additive rules work as a positive list, so a sweetener not on the list is not among those permitted for use in food in India.

Q: Does cyclamate cause cancer?

The 1969 study that triggered the US ban linked a saccharin-cyclamate mixture to bladder tumours in rats. Later reviews read the evidence differently: the FDA's own Cancer Assessment Committee concluded in 1984 that cyclamate is not carcinogenic, and the EU and WHO expert committees have set acceptable daily intakes rather than treating it as a carcinogen. The US ban nonetheless remains in force.

By LabelCop · Last updated 13 August 2026 · Sources: FDA, EFSA/SCF, FSSAI, WHO/JECFA, Health Canada

The short answer: the US banned it in 1970 and never un-banned it — while Europe still permits it within limits. Few additives split regulators this sharply.

US FDA: banned from food since 1970, after a study linked a saccharin-cyclamate mixture to bladder cancer in rats
EU: permitted within limits (ADI 7 mg/kg, set 2000) — EFSA re-evaluation ongoing
India (FSSAI): not on the permitted sweetener list · Canada: table-top sweetener only, not in foods
LabelCop: flags E952 on every label — strictest regulator wins

What is cyclamate?

An artificial sweetener discovered in 1937 — roughly 30-50 times sweeter than sugar
Cheap and heat-stable, so it survives cooking — often blended with saccharin to mask both sweeteners' aftertastes
Label names: cyclamate, cyclamic acid, sodium cyclamate, calcium cyclamate, E952, INS 952

Which foods contain it?

Sweetener tablets and liquid table-top sweeteners
Diet and sugar-free soft drinks and squashes (outside the US)
Sugar-free desserts, jellies and canned fruit
Sugar-free chewing gum and confectionery

In India: cyclamate is not on FSSAI's permitted sweetener list — if an imported product lists INS 952 or sodium cyclamate, that additive is not among those FSSAI permits in food

What the regulators actually say

Regulator	Status	Reasoning
FDA (United States)	Banned from food since 1970	Removed after a 1969 study linked a saccharin-cyclamate mixture to bladder tumours in rats. A 1980 Commissioner's Decision upheld the ban. The FDA's own Cancer Assessment Committee concluded in 1984 that cyclamate is not carcinogenic, but the ban has never been lifted — a re-approval petition remains unresolved.
EFSA / European Union	Permitted within limits, under re-evaluation	Authorised as sweetener E952. The EU's Scientific Committee on Food set an acceptable daily intake of 7 mg per kg of body weight in 2000, based on the cyclohexylamine metabolite. EFSA is re-evaluating cyclamates as part of its programme covering all sweeteners approved before 2009.
FSSAI (India)	Not on the permitted sweetener list	FSSAI's approved artificial sweeteners are saccharin sodium, aspartame, acesulfame potassium, sucralose, neotame and isomaltulose. FSSAI's additive rules work as a positive list — a sweetener not on it is not among those permitted for use in food.
WHO / JECFA	ADI set: 0–11 mg/kg (1982)	The joint FAO/WHO expert committee set the intake limit based on testicular effects of the cyclohexylamine metabolite in rats. Separately, the WHO's 2023 guideline recommends against using non-sugar sweeteners — including cyclamate — for weight control.
Health Canada	Table-top sweetener only	Not a permitted food additive in manufactured foods. Sold only as a table-top sweetener, and the label must carry a statement that it should be used only on the advice of a physician.

Why do regulators disagree?

The evidence is from different eras. The US ban rests on a 1969 rat study of a saccharin-cyclamate mixture; the EU's permission rests on a 2000 review of the fuller evidence
Later reviews weakened the cancer case: the FDA's own committee found cyclamate not carcinogenic in 1984 — yet no US regulator has reversed the ban
The modern safety question moved on: today's ADIs are about cyclohexylamine, a metabolite some people's gut bacteria produce from cyclamate, which caused testicular effects in rats at high doses
Conversion varies person to person — a key uncertainty EFSA's ongoing re-evaluation is examining
We show you the disagreement instead of quietly picking a side

How LabelCop scores it

E952 is a high-risk flag in LabelCop
Rule: strictest regulator wins — the US ban and India's positive list mean we flag it everywhere, even where it's legal
The product's score takes a penalty — and you see the flag, the reason and the sources. No black box

Frequently asked questions

Why is cyclamate banned in the US but allowed in Europe?

The FDA banned it from food in 1970 after a 1969 study linked a saccharin-cyclamate mixture to bladder tumours in rats, and upheld the ban in 1980. European regulators later reviewed the evidence and kept it permitted within limits — the EU set an ADI of 7 mg/kg in 2000, and EFSA is re-evaluating it now.

Is cyclamate permitted in India?

It is not on FSSAI's list of permitted artificial sweeteners (saccharin sodium, aspartame, acesulfame potassium, sucralose, neotame, isomaltulose). FSSAI's rules work as a positive list, so a sweetener not on the list is not among those permitted in food in India.

Does cyclamate cause cancer?

The study behind the US ban linked a saccharin-cyclamate mixture to bladder tumours in rats. The FDA's own Cancer Assessment Committee concluded in 1984 that cyclamate is not carcinogenic, and the EU and WHO committees set intake limits rather than treating it as a carcinogen. The US ban remains in force regardless.

What is cyclohexylamine?

A substance some people's gut bacteria produce from cyclamate. It caused testicular effects in rats at high doses, and it is the basis for both the WHO/JECFA ADI (0–11 mg/kg) and the EU ADI (7 mg/kg). How much a person produces varies widely — one reason EFSA is re-examining cyclamates.

How do I spot it on a label?

Look for cyclamate, cyclamic acid, sodium cyclamate, calcium cyclamate, E952 or INS 952 — most common in sweetener tablets and sugar-free drinks and desserts. Scan the label with LabelCop and it's flagged automatically, with the regulator reasoning shown.

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Sources

FDA (1980): Cyclamate — Commissioner's Decision, 45 FR 61474 · European Commission: SCF opinion on cyclamic acid and its salts — ADI 7 mg/kg (2000) · EFSA: Working Group on the re-evaluation of sweeteners · WHO/JECFA (1982): sodium cyclamate evaluation — ADI 0–11 mg/kg · WHO (2023): guideline on non-sugar sweeteners · FSSAI: note on non-sugar sweeteners — approved sweeteners in India · Canadian Food Inspection Agency: labelling requirements for sweeteners

Related ingredients: Saccharin (E954) · Aspartame (E951) · Acesulfame K (E950)

This article explains regulatory status and published scientific assessments in plain English. It is not medical advice.