Researchers followed people over time to see if eating a healthy diet called the EAT-Lancet diet could reduce the chance of getting colorectal cancer. This diet focuses on eating more plants, whole grains, and healthy fats while eating less red meat. The study looked at both regular people and those with diabetes. Scientists found that people who followed this diet more closely had a lower risk of developing colorectal cancer. This suggests that the foods we choose every day might play an important role in protecting our health from serious diseases.
The Quick Take
- What they studied: Whether eating according to the EAT-Lancet diet (a plant-based eating plan) could help prevent colorectal cancer in people with and without diabetes
- Who participated: A large group of people from the general population who were followed over several years to track their eating habits and health outcomes
- Key finding: People who followed the EAT-Lancet diet more closely appeared to have a lower risk of developing colorectal cancer compared to those who didn’t follow it as well
- What it means for you: Eating more plant-based foods and fewer processed meats may help reduce your colorectal cancer risk, though diet is just one of many factors that affect cancer risk. This is especially relevant if you have diabetes or are concerned about cancer prevention.
The Research Details
This was a cohort study, which means researchers followed a group of people over time and tracked what they ate and whether they developed colorectal cancer. The EAT-Lancet diet is a specific eating plan that emphasizes vegetables, fruits, whole grains, nuts, and legumes while limiting red meat, processed foods, and added sugars. Researchers compared people who stuck closely to this diet with those who didn’t follow it as well. They also looked separately at people with diabetes to see if the diet’s benefits were different for this group.
Cohort studies are valuable because they follow real people in their everyday lives over long periods, which helps researchers understand how diet affects health in the real world. By tracking actual eating habits and health outcomes, scientists can see patterns that might not show up in shorter studies. This approach is especially important for cancer research because cancer develops slowly over many years.
This study was published in a respected nutrition journal, which means it went through expert review. The researchers tracked people over time rather than just asking them about the past, which is more reliable. However, the study relied on people reporting what they ate, which can sometimes be inaccurate. The specific sample size wasn’t provided in the available information, which limits our ability to assess the study’s statistical power.
What the Results Show
The main finding was that people who followed the EAT-Lancet diet more closely had a lower risk of developing colorectal cancer. This relationship held true for both people without diabetes and those with diabetes, suggesting the diet’s protective effect works across different populations. The more closely someone followed the diet’s principles—eating more plants and fewer animal products—the greater the apparent benefit. The study suggests this isn’t about one single food but rather the overall pattern of eating that matters.
The research likely examined whether specific components of the diet (like eating more vegetables or less red meat) had particular importance. The study probably also looked at whether the benefits were different for men versus women, or for different age groups. These details help scientists understand which parts of the diet are most protective.
Previous research has shown that red meat and processed meat consumption increases colorectal cancer risk, while plant-based foods appear protective. This study builds on that knowledge by testing a comprehensive diet plan rather than looking at single foods. The EAT-Lancet diet was created by scientists to be both healthy for people and sustainable for the planet, so this research helps confirm its health benefits.
The study relied on people remembering and reporting what they ate, which can be inaccurate. People who choose to follow healthy diets often have other healthy habits too (like exercising more), so it’s hard to know if the diet itself or these other factors caused the lower cancer risk. The study was observational, meaning researchers watched what happened rather than randomly assigning people to eat differently, so we can’t be completely certain the diet caused the lower risk. Different populations may respond differently to the diet, so results might not apply equally to everyone.
The Bottom Line
If you’re concerned about colorectal cancer risk, consider eating more plant-based foods like vegetables, fruits, whole grains, nuts, and beans, while reducing red meat and processed meat consumption. This recommendation has moderate confidence based on this and other research. These changes also benefit heart health and weight management. Talk to your doctor about your personal cancer risk factors and screening recommendations.
This research is relevant for anyone interested in cancer prevention, especially those with a family history of colorectal cancer or those with diabetes. People over 45 (the age when colorectal cancer screening typically begins) should pay particular attention. However, cancer risk involves many factors beyond diet, including genetics, age, smoking, and physical activity.
Cancer prevention through diet is a long-term strategy. You wouldn’t expect to see dramatic changes in weeks or months. The protective effects likely develop over years of consistent healthy eating. Start making dietary changes now if cancer prevention is a goal, but understand that benefits accumulate over time.
Want to Apply This Research?
- Track daily servings of vegetables, fruits, whole grains, and legumes versus servings of red meat and processed meat. Aim for at least 5 servings of plants daily and limit red meat to 1-2 times per week.
- Replace one red meat meal per week with a plant-based alternative (like beans, lentils, or tofu). Add one extra vegetable serving to your lunch or dinner each day. These small changes build toward the EAT-Lancet diet pattern.
- Weekly check-ins on plant-based meal frequency and red meat consumption. Monthly reviews of overall diet pattern adherence. Track any improvements in energy levels, digestion, or other health markers you notice.
This research suggests an association between diet and colorectal cancer risk but does not prove that diet alone prevents cancer. Cancer risk involves multiple factors including genetics, age, family history, smoking, physical activity, and alcohol use. This information should not replace medical advice from your healthcare provider. If you have concerns about colorectal cancer risk or symptoms, consult with a doctor. Dietary changes should be discussed with your healthcare team, especially if you have diabetes or take medications that may interact with dietary changes.
This research translation is published by Gram Research, the science division of Gram, an AI-powered nutrition tracking app.