Vitamin D and cardiovascular risk.

Area of Science:

• Endocrinology
• Cardiovascular Medicine
• Nutritional Science

Background:

• Vitamin D deficiency impacts bone health, leading to supplementation programs for infants.
• Vitamin D has roles in immunity, cancer prevention, muscle function, and heart health.
• Early rodent studies suggested vitamin D supplementation could be pro-atherogenic, causing ectopic ossification.

Purpose of the Study:

• To reconcile conflicting findings on vitamin D's role in atherosclerosis.
• To investigate the differential mechanisms of vitamin D activation in rodents and humans.
• To evaluate the potential of vitamin D supplementation in preventing or treating atherosclerosis and hypertension.

Main Methods:

• Review of early rodent studies on vitamin D supplementation effects.
• Analysis of cross-sectional human studies correlating vitamin D levels with cardiovascular markers.
• Examination of novel findings on vitamin D's anti-inflammatory mechanisms.

Main Results:

• Vitamin D deficiency is associated with elevated blood pressure and atherosclerosis progression in humans.
• Contradictory effects in rodents versus humans may stem from differing vitamin D activation pathways.
• Emerging evidence highlights vitamin D's significant anti-inflammatory properties.

Conclusions:

• Vitamin D supplementation in adults shows promise for preventing or halting atherosclerosis and managing hypertension with minimal side effects.
• Specific dosing adjustments are necessary for patients with chronic kidney disease.
• Prospective clinical trials are essential to establish evidence-based recommendations for vitamin D supplementation in cardiovascular health.