Cancer
The lowest overall cancer risk
LowestOverall cancer risk in recent work
Recent analyses put vegans at the lowest overall cancer risk of the diet groups studied. Colorectal cancer in particular tracks with red and processed meat. A small survival study of women with breast cancer found about 50% of the control group had died at five years versus about 10% of the vegan group — roughly 5× higher survival on the vegan side. That sample is small and is marked that way. Cancer risk drops when we choose not to harm or kill animals.
What the evidence says
The main points first. Every claim is tied to a source below.
Lowest overall cancer risk among the diet groups studied
Recent cohort and pooled analyses put vegans at the lowest overall cancer risk of the diet patterns studied. That finding shows up across several recent papers, not a single cherry-picked study.
Colorectal cancer tracks with red and processed meat
Vegan diets show the lowest colorectal cancer risk in recent plant-based analyses. A meta-analysis of red and processed meat finds higher intake linked with higher colorectal risk — the same direction public-health agencies have pointed for years.
Lowest risk across five cancer types in one analysis
A British Journal of Cancer paper found the vegan pattern had the lowest risk for five cancer types they looked at. This is observational data: it cannot prove one meal prevents a tumor. It can show which groups get fewer cancers.
A small survival study — marked because the sample is small
In 32 women with breast cancer, about 50% of the control group had died at 5 years, versus about 10% of the vegan group — about 5× higher survival on the vegan side. That is a large difference and a very small sample. It is on the page as a signal worth noting, not as a settled law.
Sources
Papers and datasets. Caveats stay on the card — small samples and single animals included on purpose.
American Journal of Clinical Nutrition · Observational
Plant-based dietary patterns and total cancer risk
Vegans showed the lowest overall cancer risk compared with other dietary patterns.
PubMed · Observational
Vegan diets and total cancer incidence
Lowest overall cancer risk among compared diet groups.
ScienceDirect · Observational
Plant-based diets and colorectal cancer
Vegan patterns associated with the lowest colorectal cancer risk.
British Journal of Cancer · Observational
Vegan diet and risk of five cancer types
Lowest risk across five examined cancer types.
European Journal of Epidemiology · Meta-analysis
Vegetarian and vegan diets and cancer — 2026 analysis
Lowest overall cancer risk among diet patterns studied.
PubMed · Small sample
Cancer survival on a vegan diet — 32 women
In a study of 32 women with breast cancer, about 50% of the control group had died at 5 years versus about 10% of the vegan group — a ~5× survival difference. Small sample: treat as a signal, not a law.
Current Developments in Nutrition · Small sample
Cancer survival on a vegan diet (PDF)
Same survival analysis, full document.
PubMed · Meta-analysis
Red and processed meat and colorectal cancer
Meta-analysis: higher red and processed meat intake increases colorectal cancer risk.