Sucralose and cancer risk across animal, cell, and human studies
What it found
Across lab, animal, and human studies, sucralose showed no signs of causing cancer or damaging DNA.
The authors say it does not demonstrate carcinogenic activity even at doses far above what people normally consume.
What they found
Studies in people
Human tolerance trial
In a 13-week trial, healthy adults took rising daily amounts of sucralose up to 500 mg. Blood tests, heart readings, and eye exams stayed normal, with no signs pointing to cancer risk.
Animal and lab studies
DNA damage in cells
Tests in cells and lab dishes showed sucralose did not cause gene changes or chromosome damage. Two cell studies reported positive results, but they used cancer cell lines and extremely high amounts that do not match normal body conditions.
Long-term animal cancer tests
Rats fed sucralose for 104 weeks and mice fed it for 104 weeks showed no increase in tumors. Dogs given high amounts daily for 52 weeks had no tissue changes linked to cancer.
Studies in people and animals
How the body handles it
After swallowing, about 85% of sucralose passes through the body unchanged and leaves in stool. Only 2 to 3% is changed slightly in people, and it does not build up in fat or tissues.
Other findings
Chemical structure and stability
Sucralose is made from table sugar by swapping three parts with chlorine atoms. Lab tests show it is very stable and contains no chemical features linked to cancer risk.
What the authors conclude
- They state that the chemical makeup, animal tests, and human trials together show sucralose does not cause cancer.
- They note that even when animals were given amounts hundreds of times higher than typical human intake, no tumor growth was seen.
- They advise that the evidence supports the decisions of international regulators who have evaluated sucralose.
How it was done
Health authorities are often asked whether sweeteners can cause cancer. The authors wanted to gather all the research regulators rely on to judge if sucralose could be linked to cancer.
The authors searched multiple scientific databases for studies on sucralose and cancer. They looked at chemical tests, cell and animal experiments, and a 13-week trial in healthy adults. They also reviewed data submitted to international food safety agencies.
What it can’t tell you
- A 13-week trial in people cannot show what might happen over many years of use.
- Observational surveys mentioned in the text tracked sweetener drinks generally, so they cannot isolate the effects of sucralose alone.
- Animal studies use doses far higher than people ever eat, so they may not perfectly reflect everyday human exposure.
Who paid
- Authors work at
- Queen Mary University of London, UK; University of Nebraska Medical Center, USA; d Experimental Pathology Laboratories, USA
The paper
- Title
- Sucralose Non-Carcinogenicity: A Review of the Scientific and Regulatory Rationale
- Type
- ReviewThe authors read earlier studies and describe what they found. It isn’t a new study.
- Evidence
- Studies in people · animals · lab
- Summarised from
- Full text
- Cite
- Berry C, Brusick D, Cohen SM, Hardisty JF, Grotz VL, Williams GM (2016). Sucralose Non-Carcinogenicity: A Review of the Scientific and Regulatory Rationale. Nutrition and cancer. doi:10.1080/01635581.2016.1224366Free full textPubMed 27652616DOI
Summary written 30 Sep 2026. Check it against the paper before it changes what you eat. How we summarise papers · Report an error