A randomized, double-blind, controlled trial showed that weekly supplementation with 50,000 IU of vitamin D added to antihypertensive medications improved systolic, diastolic, and mean arterial blood pressures in hypertensive patients who were deficient in vitamin D.
In patients with hypertension, or high blood pressure, there are two measurements that serve as important indicators: systolic and diastolic blood pressure. Systolic blood pressure (SBP) is the top number in a blood pressure reading. This is the highest measurement of the arterial pressure when the heart contracts, or beats.
Diastolic blood pressure (DBP) is the bottom number in a blood pressure reading. This is the lowest measurement of arterial pressure between heartbeats, when the heart is resting.
Mean arterial blood pressure (MAP) is the average of SBP and DBP. It is often elevated in hypertensive patients but is not commonly measured in clinical practice.