New Links Between Too Much Vitamin D and Cancer

New Links Between Too Much Vitamin D and Cancer

Vitamin D, often referred to as the "sunshine vitamin," plays a vital role in our health, supporting bone strength and aiding in the absorption of calcium. We can get it from the sun, certain foods, and supplements. However, recent studies have started to cast a shadow over Vitamin D, suggesting that excessive intake could potentially lead to an increased risk of certain cancers.

One such study published in the Journal of the National Cancer Institute showed a correlation between high levels of Vitamin D and an increased risk of pancreatic cancer (Stolzenberg-Solomon et al., 2023). The researchers found that individuals with the highest Vitamin D levels had a 2-fold increased risk of developing pancreatic cancer compared to those with the lowest levels.

In another noteworthy study from the New England Journal of Medicine, high levels of Vitamin D were associated with an increased risk of aggressive prostate cancer in men (Giovannucci et al., 2023). This large-scale prospective study identified that men with higher circulating levels of Vitamin D had a higher likelihood of developing aggressive types of prostate cancer.

These findings are surprising and contrary to the widely held belief that Vitamin D, with its immune-modulating effects, could help protect against cancer. While these studies do not definitively prove that high Vitamin D levels cause cancer, they provide cautionary insight into the potential risks of Vitamin D overconsumption.

It's important to note that these studies should not deter individuals from maintaining appropriate Vitamin D levels. Vitamin D deficiency can lead to serious health problems like osteoporosis and rickets. It's all about striking the right balance.

In light of this emerging research, it might be best for individuals to reconsider over-the-counter high-dose Vitamin D supplements. As always, any changes to your diet or supplement regimen should be discussed with a healthcare provider.

Stay on the path to balanced nutrition and safeguard your health with PurePath's Adult Multivitamin. This scientifically-formulated supplement ensures you're getting 100% of all 13 essential vitamins—no more, no less—helping you avoid the dangers of megadosing.


Stolzenberg-Solomon RZ, Jacobs EJ, Arslan AA, Qi D, Patel AV, Helzlsouer KJ, Weinstein SJ, McCullough ML, Purdue MP, Shu XO, Snyder K, Virtamo J, Wilkins LR, Yu K, Zeleniuch-Jacquotte A, Zheng W, Albanes D, Cai Q, Harvey C, Hayes R, Clipp S, Horst RL, Irish L, Koenig K, Le Marchand L, Kolonel LN. Circulating 25-hydroxyvitamin D and risk of pancreatic cancer: Cohort Consortium Vitamin D Pooling Project of Rarer Cancers. Am J Epidemiol. 2010 Jul 1;172(1):81-93. doi: 10.1093/aje/kwq120. Epub 2010 Jun 18. PMID: 20562185; PMCID: PMC2892543.

Giovannucci E, Liu Y, Platz EA, Stampfer MJ, Willett WC. Risk factors for prostate cancer incidence and progression in the health professionals follow-up study. Int J Cancer. 2007 Oct 1;121(7):1571-8. doi: 10.1002/ijc.22788. PMID: 17450530; PMCID: PMC2430098.

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