Support your colon health with the power of dairy.
Reviewed by Dietitian Lisa Valente, M.S., RD
Key Points
- Colon cancer risk may be reduced by eating dairy, including yogurt, milk, and cheese.
- These foods contain probiotics, calcium, and vitamin D to support colon health.
- Eating fiber, exercising and getting screened can also help reduce your risk.
Colorectal cancer is a major health concern, ranking as one of the most prevalent cancers and a leading cause of cancer-related mortality worldwide. As rates of the disease continue to rise, researchers are looking closely at how our daily habits influence our risk. In fact, one global analysis found that colorectal cancer accounted for over two million new cases and one million deaths back in 2021.
While we often think of dairy as a source of calcium for strong bones, its benefits go well beyond bone health–especially when it comes to protecting your gut. Scientists are discovering that the nutrients found in dairy can nourish your gut microbiome, help keep inflammation in check, and may even guard against harmful changes in colon cells that could lead to cancer. By adding the right dairy products to your daily meals, you’re not just fueling your body but also tapping into powerful tools for long-term colon health. With that in mind, here are four dairy products to consider for a healthy, resilient colon.
1. Yogurt
“Yogurt, particularly dairy yogurt containing live active cultures, has been linked by emerging research to a reduced risk of colorectal cancer,” per Whitney Stuart, M.S., RD. This versatile superfood does more than just satisfy your taste buds, it actively supports your gut health. The fermentation process used to create yogurt introduces beneficial bacteria directly into your gut microbiome, helping to maintain a healthy balance of microorganisms. Beyond its probiotic content, yogurt is also a powerhouse of calcium, a mineral shown to protect colon cells from damage.
One large-scale diet-wide association study found that yogurt intake is inversely associated with colorectal cancer risk, meaning that those who eat more yogurt tend to have a lower risk of developing the disease. And Stuart points to other research that showed that men who consumed two or more servings of yogurt each week had significantly lower rates of conventional adenomas, which are the precursors to colon cancer. “The suggested mechanism is that the probiotic bacteria in yogurt help modulate the gut microbiome, reducing inflammation and decreasing exposure to carcinogens along the colon wall,” she explains. Enjoying plain, unsweetened yogurt a few times a week is a smart choice for supporting your colon health.
2. Kefir
“Kefir is a fermented dairy product that’s rich in calcium and probiotics,” per Rachael Ajmera, M.S., RD. “The probiotics can [help] reduce inflammation, strengthen the gut’s barrier, and potentially even help slow the growth of cancer cells,” Ajmeral adds. Dairy-related foods that deliver calcium and support the gut microbiome are associated with protective benefits against colorectal cancer, making kefir an excellent addition to your weekly routine.
Recent animal research helps explain kefir’s benefits for colon health. In a study with mice that were given kefir, researchers saw both smaller and fewer tumors compared to those that didn’t get kefir. Markers linked to inflammation and cancer cell growth were also lower in the kefir group. Kefir increased helpful short chain fatty acids, which made the colon a less friendly place for harmful changes by lowering its pH and helping to strengthen the gut wall. Perhaps most importantly, kefir changed the balance of gut bacteria, supporting the colonization of “good” bacteria while reducing those linked to health problems.
3. Milk
Milk serves as one of the most accessible sources of dietary calcium. And according to research, a diet low in milk is a significant risk factor for colorectal cancer globally. The study noted that a lack of milk in the diet significantly contributes to Disability-Adjusted Life Years (DALY) and death rates associated with colorectal cancer, particularly among middle-aged and older populations.
The calcium content is one reason why dairy milk may be so beneficial. “Calcium binds to potentially harmful bile acids and fatty acids in the gut, reducing their toxic effects on colon cells while promoting healthy cell differentiation and limiting abnormal cell growth,” per Johannah Katz, MS, RDN. By neutralizing these irritating digestive acids, milk acts as a protective shield for your intestinal lining, reducing the risk of cellular damage that may eventually lead to cancer.
“Many dairy products are also fortified with vitamin D, which works alongside calcium to regulate cell growth, support apoptosis of damaged cells, and reduces inflammation in the colon,” per Katz. Dairy milk is typically fortified with vitamin D.
4. Cheese
Cheese is a natural source of calcium, which is a nutrient linked to colon health support. And some varieties, like hard Swiss, is a source of vitamin K2, which may contribute to colon health as well.
While research on cheese and colorectal cancer is still evolving, some studies suggest that moderate consumption of certain types of cheese may offer protective benefits. The unique “dairy matrix” of cheese (its combination of nutrients and bioactive compounds) may enhance nutrient absorption and support gut health, potentially lowering the risk of harmful changes in the colon.
Other Tips to Reduce Colon Cancer Risk
While adding specific dairy products to your diet offers excellent protective benefits, actual colon cancer prevention requires a well-rounded approach to your lifestyle. Combining a balanced diet with other evidence-based habits provides the best defense.
- Eat more dietary fiber: Higher intakes of wholegrains, fruit, and dietary fiber are inversely associated with colorectal cancer risk. Fiber dilutes the contents of the large bowel and reduces transit time, limiting how long potential carcinogens, or cancer-causing compounds, stay in your colon.
- Limit ultra-processed meats: There is a potential link between ultra-processed meat intake and colorectal cancer risk. Try to swap these meats for lean poultry, fish, or plant-based proteins.
- Exercise regularly: Engaging in moderate physical activity reduces systemic inflammation and improves bowel motility, keeping your digestive system functioning smoothly.
- Get regular screenings: Colonoscopies remain the gold standard for prevention. Screenings allow doctors to find and completely remove precancerous polyps before they ever turn into cancer.
And when it comes to choosing dairy products, Ajerma shares an important tip: “For best results, remember to limit highly processed dairy products or foods high in added sugar. Flavored yogurts, ice creams, and sweetened dairy drinks can add extra sugar to your diet, which could counteract some of their potential benefits.”
Our Expert Take
Dairy products like yogurt, kefir, milk, and cheese offer more than just everyday nutrition; they’re allies in supporting your colon health. Packed with calcium and other nutrients, they help protect your gut and reduce the risk of colorectal cancer naturally.
But remember, no single food is a magic bullet. Pair these benefits with a fiber-rich diet, regular exercise, and routine screenings to create a proactive, science-backed approach to your health. Small, intentional choices can make a big difference in building a resilient, healthy future.
Comments are closed.