Calcium supplementation lowering effects on blood pressure

Calcium supplementation on normotensive and hypertensive pregnant women.

The role of calcium supplementation on blood pressure was evaluated in 50 pregnant women between 18 and 28 years. 30 of them had normal blood pressure and 20 women had high blood pressure (hypertension). Study participants were randomly assigned to either a non-supplemented group or supplemented group. The supplemented group was treated with 1.000 mg/day of calcium for 20 weeks. A significant inverse relationship was observed between dietary calcium intake and systolic as well as diastolic blood pressure values. Further details can be found in the study.
The force with which blood is pressed against blood vessel walls represents the measurable blood pressure. The level of our blood pressure is directly dependent on various factors, in particular on the pumping force of the heart, the blood volume, and the elasticity of the blood vessels. Hypertension is a chronic medical condition in which the blood pressure in the arteries is persistently elevated. It can be caused by a too strong pumping function of the heart – which generally leads to an increased upper (systolic) blood pressure value. More frequently, the lower (diastolic) blood pressure value is elevated, a condition that is generally caused by a “spasm” (contraction) of the (smooth) muscle cells of the artery walls, causing the narrowing of the blood vessel diameter and the rise of the (diastolic) pressure. The most frequent cause of this artery spasm is a chronic deficiency of micronutrients in billions of artery wall cells. If high blood pressure conditions persist for a long time, they can lead to damage in other organs, including strokes, coronary heart disease, failure of the kidneys, eyes and other organs.
Knight KB, Keith RE. Calcium supplementation on normotensive and hypertensive pregnant women. Am J Clin Nutr. 1992 Apr;55(4):891-5.

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