Vegetarian diets slash cancer risk by 12%, study reveals

A large-scale study has found that vegetarian diets can significantly lower cancer risk. Compared to meat eaters, vegetarians show a 12% reduction in overall cancer cases. The research also highlights stronger protection against stomach, colorectal, and lymphatic cancers.

The findings come from a comparison of health-conscious vegetarians and non-vegetarian Adventists, a group known for their lower cancer rates. Experts suggest plant-based eating, combined with a Mediterranean-style diet, could play a key role in prevention.

The study revealed that vegetarians have a 45% lower risk of stomach cancer and a 25% lower risk of lymphoma. Their risk of colorectal cancer also drops by around 20%. Pescatarians—those who eat fish but avoid other meat—showed even greater protection against colorectal cancer than other vegetarians.

Vegans, who avoid all animal products, had about a 25% lower risk of breast and prostate cancers. Processed meats, on the other hand, were linked to higher rates of stomach and colorectal cancers. Fruits and vegetables appeared to offer some defence, particularly for lung, ovarian, and pancreatic cancers, though researchers called for further studies to confirm these effects.

The strongest benefits were seen in the digestive system, where food and its byproducts have direct contact. Adventists, a group already known for healthier lifestyles, showed a 25% lower cancer risk if non-vegetarian and a 35% reduction if vegetarian. The authors recommended a diet rich in plant compounds, fibre, and olive oil, with limited red and processed meats. They also advised cutting back on salty snacks, canned goods, and heavily processed foods, while favouring herbs, spices, and regular meal patterns like breakfast.

The research points to clear advantages in plant-based and Mediterranean-style diets for cancer prevention. Vegetarians, pescatarians, and vegans all showed lower risks across multiple cancer types. Experts now suggest shifting towards whole foods, reducing processed meats, and adopting structured eating habits to improve long-term health outcomes.