There is now overwhelming scientific evidence that vitamin D3 plays a critical role in heart and cardiovascular health. Research published in January 2018 in the International Journal of Nanomedicine shows that vitamin D helps protect and restore the endothelium—the delicate lining of blood vessels—damaged by conditions such as atherosclerosis, diabetes, high blood pressure, insulin resistance, and even tumor growth.
Vitamin D also stimulates the production of nitric oxide, a molecule essential for healthy blood flow and the prevention of blood clots. Additionally, optimal vitamin D levels significantly reduce oxidative stress in the vascular system, helping prevent the development and progression of cardiovascular disease. Deficiency has been linked to arterial stiffness and impaired blood vessel relaxation.
Studies further confirm a strong connection between low vitamin D levels and high blood pressure. When participants raised their vitamin D levels into the optimal range of 60–80 ng/ml, systolic blood pressure dropped by an average of 4–5 mmHg.
Unfortunately, vitamin D deficiency is widespread. While many labs list 30 ng/ml as “normal,” this level is far from optimal. Research suggests that 85% of Americans and 95% of U.S. seniors are deficient, with late-winter averages falling as low as 15–18 ng/ml.
Other benefits of optimal vitamin D levels include:
- Increased anti-inflammatory cytokines
- Reduced vascular calcification
- Lower risk of type 2 diabetes
- Reduced risk of age-related macular degeneration
Certain populations are at higher risk for deficiency, including older adults, individuals with darker skin, those who are overweight, and anyone with limited sun exposure.
The takeaway is simple but powerful: get your vitamin D levels checked regularly. Optimizing vitamin D isn’t just about bone health—it could be lifesaving for your heart.