Sun, vitamin D, and cardiovascular disease

Area of Science:

• Cardiovascular Research
• Endocrinology
• Public Health

Background:

• Cardiovascular disease (CVD) is the leading cause of global mortality, with urbanization and Western lifestyles contributing to its rise.
• Emerging evidence suggests vitamin D acts as a nonclassical risk factor for CVD.
• Vitamin D status is influenced by factors like season, latitude, and sun exposure, leading to widespread deficiency.

Purpose of the Study:

• To review the evidence linking vitamin D to cardiovascular health.
• To explore the potential of vitamin D supplementation in CVD prevention.

Main Methods:

• Review of experimental and epidemiological data on vitamin D and CVD.
• Analysis of findings from initial randomized trials on vitamin D supplementation.
• Examination of population-based studies on vitamin D levels and CVD mortality.

Main Results:

• Vitamin D supplementation has shown potential in promoting vasodilation and reducing cardiovascular risk markers like triglycerides and tumor necrosis factor-α.
• Low vitamin D levels (25[OH]D<25 nmol/l) are prevalent in Europe and North America.
• Studies indicate a significantly higher CVD mortality risk in individuals with deficient vitamin D levels compared to those with adequate levels (>75 nmol/l).

Conclusions:

• Experimental and epidemiological data support a role for vitamin D in CVD prevention.
• Further randomized clinical trials are necessary to establish the efficacy of vitamin D for primary, secondary, and tertiary CVD prevention.