Daijiworld Media Network – New Delhi
New Delhi, Jun 10: Regular consumption of yogurt may help reduce the risk of certain types of colon cancer by promoting beneficial gut bacteria, according to recent research, although experts caution that the evidence does not yet establish a direct cause-and-effect relationship.
Scientists have long recognised yogurt as a nutrient-rich food containing protein, calcium, vitamins and probiotics — beneficial bacteria that support digestive health. Increasingly, researchers are exploring whether these probiotic-rich foods may also play a role in reducing the risk of colorectal cancer.
Experts say the answer lies in the complex ecosystem of trillions of microorganisms living in the human gut. While some bacteria help protect the body from disease, others may contribute to inflammation and tumour growth.
According to researchers, maintaining a healthy balance of gut microbes is influenced by lifestyle factors such as diet, exercise and alcohol consumption.
"A lifestyle with limited physical activity, high alcohol intake and a diet rich in unhealthy fats can negatively affect the gut microbiome," experts noted, adding that an imbalance may weaken the body's natural defences against disease.
A major study published in 2025 tracked more than 130,000 individuals over several decades to examine whether long-term yogurt consumption influenced colon cancer risk.
Researchers found that while yogurt consumption was not associated with a lower overall risk of colon cancer, people who consumed at least two servings of yogurt per week had a 20 to 40 per cent lower risk of developing a specific type of tumour containing Bifidobacterium, a beneficial group of bacteria commonly found in the intestine.
Scientists believe probiotics may help suppress harmful bacteria, reduce chronic inflammation and produce substances that protect healthy cells from becoming cancerous.
Despite the encouraging findings, researchers stress that the available evidence only shows an association rather than proof that yogurt directly prevents colon cancer.
Experts note that probiotics introduced through foods such as yogurt often pass through the digestive system without permanently altering the gut microbiome.
The benefits, if any, are likely to depend on consistent and long-term consumption as part of an overall healthy lifestyle.
Researchers also point out that gut health is influenced by a wide range of factors, including genetics, diet, environment and physical activity.
As a result, yogurt should be viewed as one component of a balanced diet rather than a standalone preventive measure against cancer.
Doctors have observed a growing number of colorectal cancer cases among younger adults in recent years.
Studies suggest that obesity, diabetes, smoking, alcohol consumption and diets high in processed foods but low in fibre may contribute to the increasing trend.
Health experts continue to recommend diets rich in fibre, fruits, vegetables and fermented foods, including yogurt, as part of a broader strategy to support digestive health.
Nutrition experts advise consumers to select plain or unsweetened yogurt that contains "live and active cultures," indicating the presence of beneficial bacteria.
Greek yogurt is often recommended because of its higher protein content, while products containing large amounts of added sugar, artificial flavours and preservatives should be avoided.
Apart from supporting gut health, yogurt is also recognised as a good source of protein, calcium, phosphorus and B vitamins, which contribute to bone health, energy production and overall wellbeing.
While further research is needed to determine the precise relationship between yogurt and colon cancer prevention, experts agree that incorporating probiotic-rich foods into a balanced diet may contribute to better long-term health.