October 2, 2012 |
If you're trying to ward off the sniffles, you can take vitamin D supplements out of your shopping cart: A new study reports that dosing with the vitamin does nothing to prevent colds or other forms of upper respiratory tract infections (URTI). The effect of vitamin D on the immune system has been debated for a long time. Controlled laboratory research has shown that vitamin D has several beneficial effects on the immune system, and some studies conducted in the past have suggested that people with low levels of the vitamin are at higher risk for URTIs.
February 27, 2013 |
More than half of American women over the age of 60 take vitamin D and calcium supplements, but the U.S. Preventive Services Task Force said this week that they're probably wasting their money. In a new recommendations from the federal government's expert panel on preventive medicine, the task force says that most postmenopausal women should not take vitamin D and calcium to reduce their risk of bone fractures. The dosages assessed were 400 international units (IUs) of vitamin D3 and 1,000 milligrams of calcium per day. The conclusions are based on an analysis of six randomized trials designed to study the health effects of vitamin D and calcium supplements.
December 13, 2010
I was deeply saddened with the Institute of Medicine report that we are a healthy nation in regard to our calcium and vitamin D intakes ["Sweeping Away the Hype About Vitamin D," Dec. 6]. As a physician keenly interested in my patients' nutrition status and needs, I find the report flawed. By arbitrarily setting the lower limit of normal vitamin D blood level at 20 nanograms per milliliter, they are missing the borderline deficiency between 20 and 40 ng/ml. I recommend 2,000 international units of vitamin D per day to my adult patients.
August 1, 2009 |
Vitamin supplements have been both heralded and hyped over the years, only to ultimately fall from grace once research proves them to be little more than placebos in our quest for longer life or better health. But at least one substance may have true merit -- vitamin D. Long considered just a supplement consumed with calcium for bone health, this humble vitamin may have untapped potential in fighting or preventing disease, suggests an explosion of new research.
March 15, 2010 |
Raising the amount of vitamin D in the blood appears to help some people -- at least those deficient in the vitamin -- reduce their risk of heart disease by about 30%, researchers announced Monday. The findings, though preliminary, support further investigation of the interplay between vitamin D and heart health. Observational studies have linked heart disease with low vitamin D levels in the blood. In recent years, studies have shown that as many as three-quarters of Americans have a concentration in their blood that is under the normal level of 30 nanograms per milliliter.
December 1, 2010 |
A team of experts convened by the Institute of Medicine sought Tuesday to douse growing concerns that North Americans are deficient in two key nutrients ? calcium and vitamin D ? and that they risk higher rates of a wide range of chronic diseases and cancers as a result. The panel concluded that "with few exceptions, all North Americans are receiving enough calcium and vitamin D" from the foods they eat ? many of which have been fortified with both nutrients. For all but a few, adding more of those nutrients in pill form would be useless at best and, at worst, would risk harm, added the report, which was two years in the making.
April 7, 2003 |
The American Academy of Pediatrics says all exclusively breast-fed infants should receive vitamin D supplements to prevent rickets, a bone-weakening disease doctors fear may be becoming more common. Breast-fed infants should receive vitamin supplements beginning at 2 months of age and until they begin taking at least 17 ounces daily of vitamin D-fortified milk, the academy says.
May 1, 1986 |
Epidemiologists from UC San Diego recently revealed that Vitamin D and the mineral calcium may have more to do with cancer of the colon than does fiber or any other elements. And eating foods rich in calcium and Vitamin D may be the best step to prevent colorectal cancer, the second most deadly cancer in the United States.
December 13, 1989 |
Maintaining high blood levels of a certain Vitamin D compound might reduce the risk of developing colorectal cancer by as much as 80%, according to results of a joint study conducted by UC San Diego's School of Medicine and Johns Hopkins School of Hygiene and Public Health. Colorectal, or colon, cancer is the second leading cause of cancer death in the United States, with more than 150,000 new cases and 61,000 deaths reported each year.