‘Calcium-rich diets linked to reduced Colorectal Cancer risk’

Colorectal cancer, commonly known as bowel cancer, remains a significant health concern worldwide. In 2022, approximately 1.9 million individuals globally were diagnosed with this disease. Emerging research underscores the importance of dietary choices in mitigating the risk of developing colorectal cancer.

A comprehensive study conducted by the University of Oxford, involving over 542,000 women from the Million Women Study, delved into the relationship between diet and colorectal cancer risk. Published in Nature Communications, the research identified a notable association between higher calcium intake and a reduced risk of bowel cancer. Specifically, consuming an additional 300 milligrams of calcium daily—roughly equivalent to a glass of milk—was linked to a 17% decrease in colorectal cancer risk. 

The protective effect of calcium is believed to stem from its ability to bind to harmful compounds in the gut, thereby reducing potential damage to the intestinal lining. While dairy products like milk and yogurt are well-known sources of calcium, individuals who are lactose intolerant or prefer non-dairy options can obtain calcium from fortified plant-based milks, leafy green vegetables, tofu, and almonds.

Conversely, the same study reinforced existing evidence linking certain dietary habits to an increased risk of colorectal cancer. An additional 20 grams of alcohol per day—approximately one large glass of wine—was associated with a 15% higher risk. Moreover, consuming an extra 30 grams of red or processed meat daily was linked to an 8% increase in risk. 

These findings align with previous research emphasizing the role of diet in colorectal cancer prevention. A meta-analysis published in PubMed concluded that both dietary and supplementary calcium intake might continue to decrease colorectal cancer risk beyond 1,000 mg per day. The study suggested that calcium supplements and non-dairy products fortified with calcium could serve as additional preventive measures. 

In light of this evidence, health experts advocate for dietary and lifestyle modifications to reduce colorectal cancer risk. Incorporating calcium-rich foods, limiting alcohol consumption, reducing intake of red and processed meats, engaging in regular physical activity, and avoiding smoking are recommended strategies. Such proactive measures can play a crucial role in preventing colorectal cancer and promoting overall health.