It’s easy to think of vitamin D as the “bone health” nutrient, but scientists say it might do far more than keep our skeleton strong.
A new review of decades of research suggests that maintaining healthy levels of vitamin D could dramatically reduce the risk of developing colon cancer — one of the most common cancers worldwide.
What the research shows
Researchers from several institutions analyzed 50 scientific studies for the journal Nutrients and found a clear pattern: people with higher vitamin D levels had significantly lower rates of colorectal cancer.
In one of the largest long-term studies, women with the highest intake had up to a 58% lower risk compared to those with the lowest intake.
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The scientists explain that vitamin D supports the body in multiple ways — from regulating cell growth and reducing inflammation to improving immune response.
Deficiency, on the other hand, can fuel intestinal inflammation, creating a setting where abnormal cells can grow unchecked.
The role of diet and sunlight
Vitamin D is known as the “sunshine vitamin” because your body produces it when exposed to sunlight.
However, limited outdoor time, colder climates, darker skin tone, or heavy sunscreen use can reduce production — leaving many people deficient.
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To maintain optimal levels, experts recommend a mix of safe sun exposure, a balanced diet, and supplements if needed. Foods naturally rich in vitamin D include:
- Fatty fish such as salmon, tuna, and mackerel
- Egg yolks and fortified dairy products
- Mushrooms and vitamin D-enriched plant milks
Studies also suggest that people who follow the Mediterranean diet — rich in fish, nuts, seeds, vegetables, and olive oil — tend to have higher vitamin D levels and lower inflammation overall.
Why this matters
Globally, more than a million new cases of colorectal cancer are diagnosed every year. Researchers believe that a simple lifestyle approach — keeping vitamin D levels healthy — could make a meaningful difference in prevention and survival rates.
While more clinical trials are needed to confirm dosage and mechanism, scientists agree that vitamin D plays a crucial role in maintaining gut health, controlling inflammation, and supporting immune defences against cancer growth.
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It’s one more reason to get outside, eat well, and keep an eye on your vitamin D levels — a small habit with potentially life-saving impact.
Article based on information from Nutrients Journal
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