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Blood Pressure Connection
The effect of calcium on bone strength seems obvious, as bones are composed of a crystalline matrix of calcium and other material. Less obvious, but well known in the scientific literature, is the effect of dietary calcium on blood pressure. Blood pressure is controlled in part by the relative constriction or dilatation of the major and minor arteries, which open close through the action of smooth muscle fibers in the artery wall. Oddly, studies have shown that diets rich in calcium lowered the calcium influx (entrance) into the smooth muscle of the artery walls, lowering blood pressure.Medications were developed, called calcium channel antagonists (such as Nifedipine) that pharmaceutically blocked the entry of calcium into the arterial smooth muscle, thereby lowering blood pressure. While studying the effect of calcium supplementation on blood pressure in obese subjects, one group noted that the subjects experienced an 11-pound decrease in body fat in one year. This effect led the investigators to further explore the potential of this simple and inexpensive intervention on obesity.
The first step was to review the existing literature to see if a weight loss effect was recorded in other calcium studies. Astonishingly, weight loss during calcium treatment or with high calcium diets was very common in studies ranging from dietary surveys to bone loss treatment and blood pressure regulation studies. Though the degree of weight loss was modest, so too was the amount of calcium used – supplementation with 600 to 1,000 milligrams per day.
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HZ0rC8 write more, thanks.