Colorectal cancer is killing more younger people than ever before. Preventing it could be as easy as getting more of this vitamin.
Colorectal cancer is now the leading cause of cancer death in U.S. adults aged 20-49. And cases in people under 55 doubled from 11% in 1995 to 20% in 2019. But why?
Theories abound. Is it processed meat and low fiber intake? Imbalanced gut bacteria? Microplastics? Vaccines? Or are younger people just fatter than ever before? (Excess body weight increases the likelihood of developing the disease.)
We're not sure yet, but we do know this: Vitamin D plays a critical role in the prevention and treatment of colorectal cancer. A new study in the journal Nutrients confirms it.
The study
Researchers looked at 50 clinically relevant studies, comprising over 1.3 million people. The major finding? Vitamin D inhibits cancer cell proliferation, promotes differentiation, and reduces tumor invasiveness and metastatic potential (cancer's ability to spread) through its antioxidant, anti-inflammatory, and anti-carcinogenic properties.
- Immunological Mechanisms: Vitamin D regulates the immune system via vitamin D receptors (VDRs) on immune cells, enhancing functions of organs like the spleen and lymph nodes and boosting T-cell activity to combat tumors. It modulates gene expression to inhibit tumor development by suppressing cancer cell survival, proliferation, migration, and metastasis.
- Inflammatory Pathways: Vitamin D reduces inflammation linked to colorectal cancer by downregulating pro-inflammatory pathways, such as NF-κB, which connects chronic inflammation to cancer progression. It stabilizes intestinal epithelial cell junctions, reducing inflammatory damage that may promote tumorigenesis (the process by which normal cells transform into cancer cells and form a tumor).
- Nutritional Implications: Adequate vitamin D levels are associated with lower colorectal cancer risk, particularly in early-onset cases.
- Mechanistic Insights: Vitamin D inhibits the Wnt/β-catenin signaling pathway, a key driver of colorectal cancer initiation and progression. It promotes apoptosis and cell cycle arrest, reducing cancer cell growth, and interacts with gut microbiota to maintain homeostasis.
How to use this info
Since this was a "study of studies," subjects increased their vitamin D intake in several ways (diet, sun, supplements) and used various amounts of supplemental D. However, the lead researcher generally recommended taking 1000-4000 IU of D3 daily or as needed.
But starting around middle age, our bodies have a tougher time absorbing and using vitamin D. Standard vitamin D supplements don't do the trick anymore. For maximum uptake into the bloodstream, use the microencapsulated form. It absorbs better and lasts longer in the body. D Fix ➔ Buy at Biotest contains 5000 IU of this form in each softgel.
Reference
- Fekete, Mónika. "Vitamin D and Colorectal Cancer Prevention: Immunological Mechanisms, Inflammatory Pathways, and Nutritional Implications." Nutrients, vol. 16, no. 21, 2024, doi:10.3390/nu16213644.