Vegetarian Diet Linked to Lower Cancer Risk, Study Finds

A large-scale study has revealed a significant association between vegetarian diets and a reduced risk of several types of cancer. The research, analyzing data from over 1.8 million individuals, indicates that vegetarians may have a substantially lower risk of developing pancreatic, prostate, breast, kidney cancer, and multiple myeloma.

Key Findings of the Landmark Study

The study, published in the British Journal of Cancer, found the following risk reductions among vegetarians compared to meat eaters:

• Pancreatic Cancer: 21% lower risk
• Prostate Cancer: 12% lower risk
• Breast Cancer: 9% lower risk
• Kidney Cancer: 28% lower risk
• Multiple Myeloma: 31% lower risk

Dr. Aurora Pérez-Cornago, the principal investigator from the University of Oxford, stated that the findings are “really good news for those who follow a vegetarian diet” due to the observed lower risk of prevalent cancer types. Source

Nuances and Potential Risks

While the study highlights the protective benefits of a vegetarian diet, it also identified a potential increased risk associated with it. Vegetarians were found to have nearly double the risk of squamous cell carcinoma, the most common type of esophageal cancer, potentially due to deficiencies in key nutrients like B vitamins. Source

vegans exhibited a 40% higher risk of bowel cancer compared to meat eaters, possibly linked to lower average calcium intake (590mg per day versus the UK recommendation of 700mg per day) and other nutrient deficiencies. Source, Source

Dietary Variations and Cancer Risk

The research also examined the impact of other dietary patterns:

• Pescatarians (fish eaters) showed lower risks of breast, kidney, and bowel cancers.
• Poultry eaters (those consuming chicken and turkey but no red meat) had a lower risk of prostate cancer.

Researchers noted that more investigation is needed to determine whether the benefits stem from avoiding meat altogether or from specific aspects of vegetarian diets. Source

The Role of Processed and Red Meat

The study reinforces existing knowledge about the link between processed meat consumption (ham, bacon, salami) and an increased risk of bowel and potentially stomach cancer. Source Red meat, such as beef, pork, and lamb, also contributes to increased risk. Source

Study Methodology

The comprehensive study compiled data from various diet and health studies worldwide, encompassing:

• 1.64 million meat eaters
• 57,016 poultry eaters
• 42,910 pescatarians
• 63,147 vegetarians
• 8,849 vegans

Participants were followed for an average of 16 years, with adjustments made for factors influencing cancer risk like body mass index and smoking habits. The research was funded by the World Cancer Research Fund. Source

Looking Ahead

While this study provides compelling evidence for the cancer-protective benefits of vegetarian diets, researchers emphasize the need for further investigation. Future studies should focus on whether the avoidance of meat or specific dietary components contribute to the observed risk reductions, and how these findings apply to evolving dietary patterns, including the increased consumption of ultra-processed foods and fortified vegan products. Source