Eating less meat could save your life—but at what cost? A groundbreaking study has revealed that vegetarians have a significantly lower risk of developing five major types of cancer, sparking a conversation about the role of diet in our health. But here's where it gets controversial: while cutting out meat appears to protect against certain cancers, it might also increase the risk of others. Let’s dive into the details.
A landmark study published in the British Journal of Cancer analyzed data from over 1.8 million people tracked over many years. The findings? Vegetarians had a 21% lower risk of pancreatic cancer, 12% lower risk of prostate cancer, and 9% lower risk of breast cancer compared to meat eaters. That’s not all—they also had a 28% lower risk of kidney cancer and a 31% lower risk of multiple myeloma. Combined, these cancers account for about one-fifth of cancer deaths in the UK, making these findings nothing short of remarkable.
Dr. Aurora Pérez-Cornago, the study’s lead researcher, celebrated the results: ‘This is great news for vegetarians, as it shows a reduced risk of several prevalent cancers.’ But here’s the twist: the study also found that vegetarians had nearly double the risk of developing squamous cell carcinoma, the most common type of esophageal cancer. Researchers suggest this could be due to nutrient deficiencies, such as a lack of B vitamins, often found in meat.
And this is the part most people miss: vegans, who avoid all animal products, had a 40% higher risk of bowel cancer compared to meat eaters. This might be linked to lower calcium intake (an average of 590mg per day, versus the UK recommendation of 700mg) and other nutrient deficiencies. It raises a critical question: Are the benefits of a plant-based diet worth the potential risks?
The study, funded by the World Cancer Research Fund, examined 17 types of cancer and included diverse dietary groups: 1.64 million meat eaters, 57,016 poultry eaters (no red meat), 42,910 pescatarians (fish but no meat), 63,147 vegetarians, and 8,849 vegans. Participants were followed for an average of 16 years, with factors like BMI and smoking habits accounted for.
Interestingly, pescatarians had lower risks of breast, kidney, and bowel cancers, while poultry eaters showed a reduced risk of prostate cancer. However, the study found no evidence that vegetarians had a lower risk of bowel cancer compared to meat eaters. Prof. Tim Key noted that this could be because meat consumption in the study group was relatively low, and the results don’t contradict previous findings linking red and processed meat to bowel cancer.
But here’s the bigger question: Is it the absence of meat or the presence of something in plant-based diets that lowers cancer risk? Prof. Key speculates, ‘My feeling is the difference is more likely due to the meat itself, but that’s just an opinion.’ This opens the door for further research and debate.
One limitation of the study is that dietary habits have evolved since the 1990s and 2000s, when many participants were first recruited. Ultra-processed foods are now more common, and vegan products like oat milk are often fortified with nutrients. Prof. Jules Griffin, director of the Rowett Institute, pointed out that the study lacks a comparison to a balanced diet following NHS Eatwell guidelines, which includes moderate meat and fish consumption. ‘This might be the optimal diet for reducing cancer risk,’ he suggested.
So, what’s the takeaway? While a vegetarian diet offers clear benefits for certain cancers, it’s not a one-size-fits-all solution. Nutrient deficiencies and other risks must be carefully considered. And this is where we want to hear from you: Do you think the benefits of a plant-based diet outweigh the potential risks? Or is moderation the key? Let’s start the conversation in the comments below!
