If you’re hovering around menopause—or well past it—chances are your
doctor’s recommended taking a calcium supplement to help prevent osteoporosis. But now new research suggests that those supplements might actually be weakening your heart.
Swiss researchers tracked 24,000 men and women for 11 years. They found that people who regularly took a calcium supplement increased their risk for heart attack by 86%. But here’s the important distinction:
Dietary
calcium was not linked to an increased risk for heart disease. In fact,
people who ingested the most calcium through their diets actually
lowered their risk for heart attack by 31%.
What’s going on here? It may have to do with the level of calcium in
your blood, says Ian Reid, MD, a professor of medicine and endocrinology
at the University of Auckland in New Zealand, whose past research has
linked calcium to heart disease risk. “Calcium in the diet has very
little impact on blood calcium levels, whereas calcium supplements cause
abrupt increases in blood calcium over a period of a few hours,” Dr.
Reid says. Those blood-calcium spikes may lead to damaged arteries or blockages in the form of calcium deposits, he says.
Although the increase in heart attack risk associated
with calcium supplements was significant, the study authors point out
that the overall risk within the study group was still relatively
low—just 354 of the 24,000 participants suffered a heart attack during
the follow up period. More research is needed to fully understand how
calcium supplements may affect heart health.
So what should you do in the meantime? Talk to your doctor about
stopping your calcium supplements, says Dr. Reid. “Calcium in tablet
form may do more harm than good,” he says. Instead, focus on meeting
your daily calcium needs (1,000
milligrams for women age 50 and under; 1,200 for those 51 and over)
through your diet with foods like cheese, yogurt, milk, salmon, and
spinach. Check out this full list of great sources of dietary calcium.
Hiç yorum yok:
Yorum Gönder