A large new study suggests that people who follow a vegetarian diet may face a lower risk of developing several forms of cancer compared with individuals who regularly consume meat.
Researchers analyzed health data from more than 1.8 million people over a 16-year period, examining participants’ dietary habits alongside their cancer diagnoses. The findings were published on Feb. 27 in the British Journal of Cancer.
The results showed that individuals who identified as vegetarians had significantly reduced risks for multiple cancers, including pancreatic, prostate, breast, kidney, and multiple myeloma.
Lower Cancer Risk Observed in Several Major Categories
According to the study’s findings, the differences between vegetarians and meat eaters were notable in several cancer types.
Compared with individuals who consumed meat, vegetarians experienced:
- 21% lower risk of pancreatic cancer
- 12% lower risk of prostate cancer
- 9% lower risk of breast cancer
Researchers also observed reduced risks for several less common cancers. These included:
- 28% lower risk of kidney cancer
- 31% lower risk of multiple myeloma, a rare form of blood cancer.
While the study does not prove that vegetarian diets directly prevent cancer, the findings highlight a possible connection between plant-focused eating patterns and improved long-term health outcomes.
Why Plant-Focused Diets May Help
Health experts say diets centered around plant foods may offer benefits beyond basic nutrition.
Dr. Carrie Daniel, a professor of epidemiology at The University of Texas MD Anderson Cancer Center, explained that plant-heavy diets can support a healthier digestive system.
“Diets that emphasize plants also often replace processed or high-fat animal foods, which may further improve overall health patterns,” Daniel told Women’s Health.
Plant-based diets typically include foods such as vegetables, fruits, legumes, nuts, seeds, and whole grains. These foods provide fiber, vitamins, and antioxidants that may help support immune function and reduce inflammation — factors believed to play roles in disease prevention.
One Cancer Risk Appeared Higher Among Vegetarians
Despite the generally positive findings, researchers noted one surprising result.
The study found that vegetarians had nearly twice the risk of squamous cell carcinoma, which is the most common type of esophageal cancer.
Scientists believe this increased risk could be related to potential nutrient deficiencies sometimes seen in strict vegetarian diets, although more research is needed to understand the relationship fully.
Because of this unexpected result, researchers emphasized that additional studies are necessary to determine exactly why the risk appears higher in this particular case.
Researchers Say Diet Quality Matters Most
Experts caution that eliminating meat alone does not automatically create a healthier diet.
According to Dr. Sylvia Crowder, a health outcomes and behavior researcher at Moffitt Cancer Center, the most important factor is the overall quality of the diet.
“The most reliable takeaway is that a diet rich in whole plant foods — vegetables, fruits, legumes, whole grains, nuts, and seeds — appears beneficial, whether or not someone eliminates meat entirely,” Crowder explained.
In other words, a balanced diet built around nutrient-dense foods may offer health benefits regardless of whether someone chooses to follow a fully vegetarian lifestyle.
What the Findings Mean for Long-Term Health
The study’s large sample size and long observation period provide valuable insight into how diet may influence cancer risk.
While the research does not establish a direct cause-and-effect relationship, it suggests that plant-focused eating patterns could play a role in reducing the likelihood of certain cancers.
For many health experts, the takeaway is simple: incorporating more whole plant foods into daily meals may be a practical step toward improving overall wellness.