Vitamin D deficiency and essential hypertension

Area of Science:

• Cardiovascular Medicine
• Endocrinology
• Nutritional Science

Background:

• Essential hypertension (EH) involves an imbalance favoring vasoconstriction over vasodilation.
• Genetic and epigenetic factors regulate this balance.
• Vitamin D deficiency acts as an epigenetic factor, promoting vasoconstriction and potentially contributing to EH.

Purpose of the Study:

• To critically analyze clinical findings on vitamin D's effect on blood pressure.
• To review molecular mechanisms underlying vitamin D's influence on blood pressure regulation.
• To reconcile mixed results from previous studies on vitamin D supplementation and hypertension.

Main Methods:

• Systematic review and critical analysis of clinical trials investigating vitamin D and blood pressure.
• Examination of molecular pathways linking vitamin D to vascular tone.
• Evaluation of study designs and patient populations in existing literature.

Main Results:

• Vitamin D repletion demonstrates a clinically significant antihypertensive effect in patients with vitamin D-deficient EH.
• Some trials reported no effect, potentially due to suboptimal study design.
• Short-term vitamin D supplementation did not affect blood pressure in normotensive individuals.

Conclusions:

• Vitamin D repletion is a potentially effective intervention for lowering blood pressure in EH patients with vitamin D deficiency.
• Future research should focus on optimizing study design and patient selection for vitamin D intervention trials in EH.
• Understanding the role of epigenetic factors like vitamin D is crucial for managing hypertension.