Link Between Ultraprocessed Foods and Colon Cancer: What You Need to Know
If you can’t pronounce an ingredient on the package, chances are you’re holding an ultraprocessed food. While that’s a helpful rule of thumb, a groundbreaking new study suggests we all need to pay closer attention to these convenient, hyperpalatable products that have become staples in the American diet.
Research published on November 13, 2025 in a leading medical journal reveals a troubling connection between ultraprocessed food consumption and colon cancer risk, particularly for women. The findings add urgency to an already concerning trend: early-onset colorectal cancer cases are rising at the same time ultraprocessed foods are dominating our food supply.
At CMC Digestive Health, we’re committed to helping you understand these risks and take action to protect your health.
Ready to take control of your digestive health? Schedule your colon cancer screening at CMC Digestive Health today. Our experienced gastroenterologists use advanced technology to detect and prevent colorectal cancer.
IN THIS ARTICLE:
What Are Ultraprocessed Foods?
Ultraprocessed foods aren’t simply foods that have been cooked, canned, or preserved. They’re industrial formulations made mostly or entirely from substances extracted from foods, combined with additives designed to make the final product convenient, shelf-stable, and nearly irresistible.
These foods are created through processes you couldn’t replicate in your own kitchen. They contain ingredients like:
- High-fructose corn syrup
- Hydrogenated oils
- Modified starches
- Protein isolates
- Chemical additives, including flavors, flavor enhancers, colors, emulsifiers, sweeteners, thickeners, and preservatives
The most common ultraprocessed foods include:
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Diet sodas and sugar-sweetened beverages
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Packaged snacks like chips and cookies
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Ready-to-eat meals like frozen pizzas and instant noodles
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Mass-produced breads and baked goods
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Flavored yogurts
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Processed meats like sausages and hot dogs
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Many condiments
What might surprise you is that seemingly innocent choices like fruit drinks, many breakfast cereals, and energy bars also fall into this category.
According to the Centers for Disease Control and Prevention, Americans currently get approximately 55% of their daily calories from ultraprocessed foods. The numbers are even more striking for young people ages one to 18, who consume nearly 62% of their calories from these products.
The Study That’s Changing How We View Diet and Colon Cancer
Researchers analyzed 24 years of data from nearly 30,000 female nurses participating in a long-term health study. The participants were all younger than 50 years old when they underwent colonoscopy screenings.
What the researchers discovered should make everyone reconsider their grocery cart. Women consuming the highest amount of ultraprocessed foods—around 10 servings per day—had a 45% higher risk of developing early-onset conventional adenomas compared to those eating the lowest amount, around three servings daily.
Conventional adenomas are precancerous polyps that are strongly associated with early-onset colorectal cancer.
To put this in perspective, women eating an average of three servings of ultraprocessed foods per day had about a 3% risk of developing these precancerous polyps. For women eating 10 or more servings daily, that risk jumped to 5%.
While those percentages might seem small, a 45% increase in relative risk is significant from a public health standpoint.
The association remained strong even after researchers accounted for other risk factors including body mass index, type 2 diabetes, and fiber intake. This suggests that ultraprocessed food consumption is an independent risk factor for developing precancerous colon polyps, separate from its effects on weight or other health conditions.
Interestingly, the link was specific to conventional adenomas and not observed for another type of polyp called serrated lesions. This distinction matters because conventional adenomas are more commonly associated with early-onset colorectal cancer, which is diagnosed before age 50.
Why Women’s Risk Is Now a Critical Concern
This latest research represents a crucial development in understanding colorectal cancer risk for women specifically. A previous study found that men with the highest ultraprocessed food consumption had a 29% higher risk of developing colorectal cancer overall, but no significant association was found for women in that particular study.
The current findings fill a critical gap. They demonstrate that ultraprocessed foods do indeed increase cancer risk for women, but the connection appears to manifest earlier in the disease process through the development of precancerous polyps.
This discovery is particularly important given the alarming rise in early-onset colorectal cancer rates among younger women.
How Ultraprocessed Foods Damage Your Gut
While the study doesn’t definitively prove a causal link, researchers have identified several biological mechanisms through which ultraprocessed foods might increase cancer risk. Understanding these pathways can help motivate dietary changes.
Poor Nutritional Quality
Ultraprocessed foods are typically low in fiber and lack the protective plant-derived compounds essential for maintaining gut health. These beneficial compounds found in whole foods help regulate cell growth and protect against cancer development.
Chronic Inflammation
These products often contain high levels of sugar, salt, saturated fat, emulsifiers, and artificial flavorings. These ingredients can cause chronic low-grade inflammation in the gut.
Inflammation is a known driver of cancer development, creating an environment where abnormal cells can thrive and multiply.
Gut Microbiome Disruption
A diet heavy in ultraprocessed foods negatively alters the balance of beneficial bacteria in your gut. Your gut microbiome plays a crucial role in digestion, immune function, and even cancer prevention.
When harmful bacteria outnumber beneficial ones, it increases gut wall permeability, allowing inflammatory compounds to enter your bloodstream. This process, sometimes called “leaky gut,” contributes to systemic inflammation throughout your body.
Metabolic Disease Risk
Ultraprocessed foods are associated with increased risk of obesity and type 2 diabetes. Both conditions independently raise your risk of various cancers, including colorectal cancer, creating a dangerous cycle where poor diet leads to metabolic disease, which further elevates cancer risk.
Simple Strategies to Protect Your Digestive Health
The good news is that reducing your ultraprocessed food intake doesn’t require perfection or deprivation. Health organizations recommend emphasizing whole, nutrient-dense foods.
1. Focus on Whole Foods
Build your diet around:
- A variety of colorful fruits and vegetables
- Whole grains like brown rice, quinoa, and whole wheat bread
- Beans and legumes
- Lean proteins from fish, poultry, eggs, and plant sources
2. Become an Ingredient Detective
When shopping, look at ingredient lists carefully. If you see ingredients you can’t pronounce or wouldn’t use in your own cooking, that product is likely ultraprocessed.
Look for items with short ingredient lists made up of recognizable whole foods.
3. Make Smart Swaps
Choose:
- Fresh or frozen fruits and vegetables without added sauces or seasonings
- Plain yogurt that you can flavor yourself with fresh fruit
- Whole grain breads with minimal ingredients
- Unprocessed meats rather than deli meats or sausages
4. Limit Sugar-Sweetened Beverages
This includes sodas and many fruit drinks. These are among the most commonly consumed ultraprocessed products and provide little to no nutritional value.
5. Cook at Home More Often
Home-cooked meals give you complete control over ingredients and processing methods. They typically contain far fewer additives and preservatives than restaurant or packaged meals.
Small changes add up. If you currently eat 10 servings of ultraprocessed foods daily, reducing to six servings makes a meaningful difference. Every whole food you choose instead of a processed alternative benefits your gut health and reduces your cancer risk.
Ask us about nutrition counseling and dietary strategies to support your digestive health.
When to Get a Colon Cancer Screening
Dietary changes are crucial for prevention, but they’re not a substitute for appropriate colon cancer screenings. Early detection remains your best defense against colorectal cancer because precancerous polyps can be identified and removed before they develop into cancer.
Current guidelines recommend that adults at average risk begin colon cancer screening at age 45. However, if you have a family history of colorectal cancer, inflammatory bowel disease, or certain genetic syndromes, you may need to start screening earlier.
We offer comprehensive colorectal cancer screening and prevention services at CMC Digestive Health. Our experienced gastroenterologists use advanced technology to perform colonoscopies, the gold standard for detecting and removing precancerous polyps.
During this procedure, your physician can visualize the entire colon and remove any suspicious polyps before they become cancerous.
Don’t wait until symptoms appear. Most precancerous polyps and early-stage colon cancers produce no symptoms at all.
By the time you notice problems like rectal bleeding, persistent abdominal pain, or unexplained weight loss, the disease may have progressed significantly.
Schedule your screening at CMC Digestive Health today. Our compassionate team understands that colon cancer screening can feel intimidating, but we’re committed to making the process as comfortable as possible.
We’ll answer all your questions, explain the preparation process thoroughly, and ensure you receive the highest quality care.
Protecting your digestive health requires both smart dietary choices and appropriate medical screening. By reducing your intake of ultraprocessed foods and staying current with recommended screenings, you’re taking powerful steps to reduce your colorectal cancer risk.
Call CMC Digestive Health today to schedule your colon cancer screening. Learn more about our comprehensive services and colorectal cancer awareness resources. Your future self will thank you.
Key Takeaways
- Women consuming 10 or more servings of ultraprocessed foods daily have a 45% higher risk of developing precancerous colon polyps compared to those eating just three servings per day
- Americans get more than half their daily calories from ultraprocessed foods, with young people consuming even more at nearly 62% of their diet
- Ultraprocessed foods contain ingredients you’d never find in a home kitchen, including high-fructose corn syrup, hydrogenated oils, and various artificial additives
- These foods alter your gut bacteria, increase inflammation, and raise your risk of obesity and diabetes
- Regular colon cancer screenings at CMC Digestive Health can detect precancerous polyps before they become dangerous
Sources
JAMA Oncology, “Ultraprocessed Food and Early-Onset Colorectal Cancer Precursors Among Women,” https://jamanetwork.com/journals/jamaoncology/article-abstract/2841354
Centers for Disease Control and Prevention, “How Much Ultra-Processed Food Are People Eating in the United States?” https://blogs.cdc.gov/nchs/2025/08/07/7825/
Wang L, Du M, Wang K, Khandpur N, Rossato SL, Drouin-Chartier JP, Martínez Steele E, Giovannucci E, Song M, Zhang FF, “Association of ultra-processed food consumption with colorectal cancer risk among men and women: results from three prospective US cohort studies,” https://doi.org/10.1136/bmj-2021-068921
The content within this article and others on this website is only for educational purposes and should not be considered medical advice. For any questions or concerns, please consult with your healthcare provider.
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