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Vegan, vegetarian diets show stark difference in cancer risk

A large North American study found vegetarians have a 12% lower cancer risk and vegans up to 25%, with significant reductions in stomach and lymphoma cancers, researchers said.

  • Researchers followed nearly 80,000 Seventh-day Adventists in North America from 2002 to 2015 to study cancer risks related to diet.
  • The study occurred because prior research suggested diets low in meat and high in fiber may reduce risks of cancers, prompting this long-term analysis.
  • Vegetarians had a 12% lower overall cancer risk, with 45% fewer stomach cancers, 25% fewer lymphomas, and about 20% fewer colorectal cancers than meat eaters.
  • Gary Fraser explained that this study provides some of the most reliable evidence to date on the links between vegetarian diets and less common cancers, with particularly convincing results for stomach cancer and lymphomas.
  • These findings suggest vegetarian and vegan diets may lower risks for some cancers, but researchers emphasize increasing vegetable intake over strict veganism for health benefits.
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The Times broke the news in United Kingdom on Monday, August 11, 2025.
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