May 26, 2011 |
Calcium is important for bone health, but medical experts have long debated how much calcium people should consume to reduce the risk of osteoporosis later in life. A new study suggests that the U.S. recommendation for adult women may be unnecessarily high. The recommended dietary allowance for women ages 51 and older in the United States is 1,200 milligrams a day -- compared with the recommendation in the United Kingdom of 700 milligrams per day. The new study, published online Tuesday in the British Medical Journal , suggests that consuming more than 700 mg a day won't help.
April 20, 2011 |
Calcium supplements appear to slightly raise the risk of heart attack, a new analysis suggests. But the data, from postmenopausal women who took supplements over seven years, are far from conclusive. So don’t throw out the multivitamins just yet – or those calcium supplements that many women take for bone health. Not all doctors are convinced that this study, led by the University of Auckland, is the last word on calcium supplements. Or that it changes the debate at all. The results from previous studies of calcium and heart attack risk, including ones from the same research team, have been widely criticized.
April 3, 2011 |
A team of Harvard researchers may have discovered a new way to ward off the red, itchy rash caused by allergies to nickel. All it takes is a dab of topical cream, according to research published online Sunday in the journal Nature Nanotechnology. Thirty million to 45 million people -- more than 10% of the U.S. population -- are sensitive to nickel found in common objects including jewelry and coins, the paper reported. Among the sufferers: study lead author Jeffrey M. Karp of Harvard's Brigham and Women's Hospital in Boston, a nanoparticles specialist who sought a way to treat the irritating allergy.
January 18, 2011 |
Calcium channel blockers prescribed to lower blood pressure and macrolide antibiotics to treat infections can combine to sharply reduce blood pressure in the elderly, leading to an increased risk of hospitalization and other problems, Canadian researchers reported Monday. The combination of drugs probably reduces blood pressure in younger patients as well, but represents a bigger risk in the elderly, who are already at increased risk of falls, said Dr. David Juurlink of the Sunnybrook Research Institute in Toronto, who led the study reported in the Canadian Medical Assn.
January 10, 2011 |
I suffer from digestive upset when taking antibiotics, and I'd like to counter that with the probiotic bacteria in yogurt. Does taking antibiotics with yogurt affect absorption of antibiotics? It depends to a certain extent on the antibiotic, but many should not be taken within a few hours of yogurt or other calcium-rich foods. That includes antibiotics in the tetracycline family and drugs such as ciprofloxacin and norfloxacin, but not ofloxacin. Fruit juice fortified with calcium also can interfere with antibiotic absorption.
December 12, 2010 |
The Institute of Medicine recently upended the health apple cart with a new study that says we don't need as much calcium or vitamin D as we've been told. In fact, taking the kind of megadose that makes you feel virtuous and keeps the supplement industry healthy can lead to kidney stones, with calcium, and kidney or heart damage, with D. If that sounds alarmist, let me quote directly from the Institute of Medicine's statement, which says that "some signals suggest there are greater risks of death and chronic disease associated with long-term high vitamin D intake.