Vitamin D status and cardiovascular outcome

Area of Science:

• Endocrinology
• Cardiovascular Medicine
• Nutritional Science

Background:

• Vitamin D is traditionally known for bone health but also impacts the cardiovascular system.
• Extraskeletal functions of Vitamin D include significant effects on cardiovascular health.

Purpose of the Study:

• To review existing literature on the relationship between vitamin D and cardiovascular outcomes.
• To summarize the evidence linking vitamin D status to various cardiovascular diseases.

Main Methods:

• Systematic review of scientific literature.
• Analysis of epidemiological studies and clinical trials.

Main Results:

• The active form of vitamin D, calcitriol (1,25(OH)2D), interacts with the vitamin D receptor (VDR) in cardiac and vascular cells.
• Low serum 25-hydroxy-vitamin D (25OHD) levels, a marker of vitamin D status, are consistently associated with higher risks of hypertension, coronary artery disease, heart failure, stroke, and type 2 diabetes.
• Despite associations, randomized controlled trials and Mendelian randomization studies have not demonstrated a clear benefit of vitamin D supplementation for cardiovascular outcomes.

Conclusions:

• While low vitamin D levels are linked to cardiovascular disease, a causative role remains uncertain due to methodological limitations in current research.
• Further investigation is needed to clarify whether vitamin D deficiency is a cause or a marker of poor health in cardiovascular conditions.