For years, women have been told to bone up on calcium to prevent osteoporosis, a gradual thinning of the bones, but now this so-called miracle mineral is also being touted for its potential to promote weight loss, relieve depression and anxiety associated with premenstrual syndrome, control high blood pressure, and ward off strokes.
As new evidence points to the elevated role of calcium in preventing disease, it makes sense to get enough of this vital nutrient each day, especially as mid-life approaches. Experts say there is literally no body system that doesn't benefit from a healthy dose. Here's how it stacks up:
Calcium and Weight Loss:
When Dr. Robert Heaney, a calcium expert at Creighton University in Omaha, recently examined the health records of 575 women, he was astonished at the results. "We were looking at mid-life weight gain and found that women with the highest calcium intakes didn't gain weight and those with the lowest did," Dr. Heaney said.
Similarly, at the University of Tennessee, Michael Zemel, Ph.D., reported that because calcium plays a key role in metabolic disorders linked to obesity and insulin resistance, a diet low in calcium literally stockpiles fat cells while higher calcium diets depletes them. Dr. Zemel discovered that a high calcium diet released a hormone which sends signals that are read by the body's fat cells to lose weight.
A two-year Purdue University study in West Lafayette, Ind. that involved 54 women ages 18 to 31, found that women with a daily intake of at least 780 milligrams of calcium showed no increase in body fat or lost body fat mass during a two-year period. Women who averaged less than 780 milligrams of calcium gained weight during the same period.
Both exercisers and couch potatoes seemed to benefit unless they consumed more than 1,900 calories daily. All researchers said that dining on calcium-rich dairy products such as milk, cheese and yogurt achieved greater weight loss than leafy green vegetables, nuts, beans and supplements.
Calcium and Premenstrual Syndrome:
Susan Thys-Jacobs, an endocrinologist at St. Luke-Roosevelt Hospital's, has found that calcium supplementation can relieve the physical and emotional toll of PMS by almost 50%. At least half of the 497 women she studied who took 1,200 mg. of calcium supplements experienced fewer mood swings, depression/sadness, anxiety/nervousness; breast tenderness, bloating and other aches and pains. The U.S. Department of Agriculture's Human Nutrition Research Center in Grand Forks, N.D. reported similar results after studying 10 women with PMS who spent half the study period on a daily diet containing 600 mg. of calcium, the other half upped to1300 mg. Women on the high calcium diet were less irritable, weepy, and depressed and averted backaches, cramping, and bloating.
