Calcium is known to regulate heart and muscle contraction. Maintaining a balanced blood calcium level is essential to life, especially for cardiac function. Doctors also suspect a link between low calcium levels and high blood pressure. Argentine researchers have found that women might influence their children's risk of high blood pressure in the future by taking calcium during pregnancy. In 1997 they studied 591 women who took 2,000 mg of calcium a day, starting in their 20th week of pregnancy.
More research needs to be done before recommendations are made.
In a California study, calcium-deficient teens significantly lowered their blood pressure by taking 1,500 mg of calcium equal to five cups of milk a day. Perhaps the most dramatic news links calcium to colon-cancer prevention . Two major studies have found that 1,200 mg of calcium a day can reduce the growth of colon polyps, from which an estimated 90 percent of colon cancers develop. In the most recent, doctors at the University of North Carolina gave 1,200 mg of calcium a day to people who'd had colon polyps removed. This group had 24 percent fewer recurring polyps than patients who did not increase their calcium intake, reports Dr. Robert Sandler.