Experts have long known that yogurt is a health-boosting food rich in protein, calcium, and other important nutrients. But some studies are exploring a specific question: Can yogurt help prevent colon cancer?
To understand the answer, it’s important to understand more about the ecosystem of microbes that live in your intestine. There are trillions of these bacteria, and some help protect your body, while others cause inflammation or even tumor growth.
This balance of helpful and unhelpful bacteria has a big influence on your health. And many of the lifestyle choices you make impact which types of bacteria thrive in your body, says Christian Jobin, PhD, co-leader of the Immuno-oncology and Microbiome Program at UF Health Cancer Center in Gainesville, Florida.
“A lifestyle that has no physical activity, high alcohol content, a diet rich in fat, and so on, reduces certain nutrients for your gut microbiome to feed on, which in turn could impact your immune system,” Jobin says.
Without enough nutrients that help promote helpful bacteria, the more harmful bacteria are left unchecked, and your gut is less protective against tumor growth. The harmful microbes may also give off toxins that damage your cells and DNA and promote tumors, Jobin says.
What does this have to do with yogurt? Some yogurt — although not all — has probiotics in it. Probiotics are helpful bacteria that can counter harmful microbes and reduce inflammation. It seems like a simple solution: Eat more yogurt, promote more good bacteria, increase your gut’s tumor-fighting power. But it’s a much more complex process, Jobin says.
“It’s difficult to have a clear understanding of the relationship between a specific dietary modification and gut health,” Jobin says. “What we try to do in the lab is to take a holistic approach to what the environment contributes to your health through the microbiome lens. And yes, yogurt could be one part, but there’s certainly a lot of other things that come into play.”
Learn more about what raises your risk of colon cancer and how yogurt may be one of the many tools to help you lower it.
Your Colon Cancer Risk May Be Increasing
Doctors used to consider colon cancer a disease of older age, but rates are rising drastically in younger people. About 1 in 5 colon cancer diagnoses happens in people under 55. Experts think environmental and lifestyle changes may be one of the reasons for this shift.
Jobin says most colorectal cancers are not genetic and develop on their own. “That means most of the time they’re linked to the environment, lifestyles, and many other things surrounding yourself, including the gut microbiome.”
Studies show that some of the risk factors for colon cancer include obesity, diabetes, smoking, and alcohol use. But also, a diet high in processed foods and low in fiber can increase your risk, too. That’s where yogurt comes in.
How Does Yogurt Impact Your Colon Cancer Risk?
Experts recommend high-fiber foods and fermented foods like yogurt as part of a “gut-friendly” diet. Research backs up their gut-balancing nature, but the direct impact on colon cancer risk is more nuanced.
A large study in 2025 looked at whether eating yogurt over many years is linked to colon cancer risk. Researchers followed more than 130,000 people for decades, tracking their diets and taking note of who later developed colon cancer. They also analyzed tumor samples to see whether a specific helpful bacteria (Bifidobacterium) was present.
The study showed that eating yogurt wasn’t linked to a lower risk of colon cancer overall, but people who ate two or more servings of yogurt per week had a 20%-40% lower risk of a specific type of colon cancer tumor that has Bifidobacteriumin it.
What this means: Helpful bacteria from yogurt can help crowd out harmful microbes. It can also help reduce chronic inflammation, which is tied to cancer risk, and make substances that may protect cells from becoming cancerous.
Is Yogurt Actually Protective?
What’s important to understand about yogurt and colon cancer risk is that so far, studies like this one have only shown a link between yogurt and colon cancer protection, which is different from a cause-and-effect relationship, Jobin says.
Probiotics help keep your gut healthy in general. No one really disagrees with that, Jobin also says. “But when you try to attach a very specific function to what they’re doing, this is where things fall apart.”
For one thing, he says, when you introduce millions of bacteria from yogurt into your gut, it’s actually very hard for them to take hold. Your microbiome starts populating itself when you’re born, shapes itself over your lifetime through your diet and environment— and wants to stay that way.
“These bacteria are protective of their niche environment, and they rarely tolerate another organism to come in,” Jobin says. “So usually these bacteria pass through; they don’t stay.”
They may stick around briefly and make helpful compounds, but any benefit is likely temporary, he says. You’d have to eat yogurt consistently and repeatedly over an extended period to have any kind of effect.
The studies also didn’t consider the specific species of bacteria (Bifidobacterium is a genus, which is a broad category that includes many different species of bacteria) the participants were eating.
The current data shows promise, Jobin says, but so far, studies have been limited and biased.
“Only studies that are more rigorous will tell,” he says.
What are some other benefits of yogurt?
Yogurt can be a great part of a balanced, nutritious diet, which supports good gut health. It’s a strong source of protein, which helps keep you full and promotes muscle health. Yogurt also gives you calcium and phosphorus, both of which help build strong bones and teeth.
Yogurt made from dairy also has B vitamins like riboflavin and vitamin B12, which help your body make energy and support brain and nerve function. There’s also some evidence that eating yogurt daily may be linked to a lower risk of heart disease and type 2 diabetes.
Researchers aren’t entirely sure why, but it may be related to how it supports processes such as blood sugar control and inflammation in your body.
Best Types of Yogurt for Gut Health
Not all yogurt is created equal. You make yogurt by heating milk, combining it with bacteria, and letting it sit for several hours at a warm temperature. The bacteria convert the sugar in milk (lactose), to lactic acid, which thickens the milk and gives it a tart flavor.
Many yogurt options you find in the supermarket have large amounts of added sugar or artificial ingredients. Others go through processing methods that kill the bacteria in them.
“It’s an umbrella term, yogurt,” Jobin says. “If the label says ‘live and active bacteria,’ then you expect that the bacteria that are in that yogurt will be able to survive and somehow maybe multiply. But if you have pasteurized yogurt, then the bacteria are dead.”
To get optimum health benefits from your yogurt, choose plain or unsweetened yogurt that doesn’t have extra sugar. For the highest protein punch, opt for Greek yogurt, which has much more per serving than other types of yogurt.
What to look for on the label
Search out yogurt that says “live and active cultures” on the label. That means it has at least 1,000,000 CFUs or colony-forming units at the time of culture.
You also want your yogurt to have a short ingredient list. Avoid added sugars, artificial flavors, gums, or fillers.
How to Incorporate More Yogurt in Your Diet
If you enjoy yogurt, there are easy ways to include it throughout the day. You can substitute plain yogurt for most creamy ingredients in foods, such as mayonnaise, sour cream, and cream cheese.
Try these options:
Yogurt for Breakfast
- Yogurt parfait with fruit and granola
- Greek yogurt on pancakes or waffles
- Smoothies with yogurt added
Yogurt for Lunch
- Swap for mayo in tuna or chicken salad
- Use instead of sour cream on tacos or baked potatoes
- Mix into dressings instead of mayo
Yogurt for Dinner
- Use as a marinade for meats
- Stir into sauces for creaminess
- Add to grain bowls or soups
Takeaways
Yogurt can be part of a healthy diet. Although research suggests it may play a role in lowering colon cancer risk, it’s not a guaranteed colon cancer prevention food.
Data from studies show it’s related to better gut health but hasn’t proven it can prevent colon cancer. Overall lifestyle habits such as exercise, balanced diet with fewer processed foods and less fat makes a bigger difference than any one food.
“You want a holistic view of a diet being beneficial,” says Jobin. “Try to balance it in a way that the combination of these good dietary components will foster and help maintain health as opposed to one ingredient.”
Written by Rachel Reiff Ellis
Medically Reviewed by Melinda Ratini, MS, DO on April 22, 2026
