Vitamins C and E do not prevent cardiovascular disease in men
A study assessing the quality of care for patients with sickle cell disease in a variety of hospital settings was presented Saturday, December 6 during the 50th Annual Meeting of the American Society of Hematology in San Francisco, CA. Two other studies on screening methods that help determine stroke risk in children with sickle cell
Full Post: Studies examine quality of care for hospitalized sickle cell disease patients
Neither vitamin E nor vitamin C supplements reduced the risk of major cardiovascular events in a large, long-term study of male physicians, according to a study in the November 12 issue of Journal of the American Medical Association.
The article is being released early online November 9 to coincide with the scientific presentation of the study findings at the American Heart Association meeting.
Most adults in the United States have taken vitamin supplements in the past year, according to background information provided by the authors. “Basic research studies suggest that vitamin E, vitamin C, and other antioxidants reduce cardiovascular disease by trapping organic free radicals, by deactivating excited oxygen molecules, or both, to prevent tissue damage.” Some previous observational studies have supported a role for vitamin E in cardiovascular disease prevention. Some previous observational studies have also shown a role for vitamin C in reducing coronary heart disease risk.
In this study, known as the Physicians’ Health Study II, Howard D. Sesso, Sc.D, M.P.H., and colleagues from Brigham and Women’s Hospital, Harvard Medical School and School of Public Health and VA Boston Healthcare System, Boston, assessed the effects of vitamin E and vitamin C supplements on the risk of major cardiovascular disease events among 14,641 male physicians. These physicians were 50 years or older and at low risk of cardiovascular disease at the beginning of the study in 1997, and 754 (5.1 percent) had prevalent cardiovascular disease. The study participants were randomized to receive 400 IU of vitamin E every other day or a placebo and 500 mg of vitamin C daily or a placebo.
“During a mean (average) follow-up of 8 years, there were 1,245 confirmed major cardiovascular events,” the researchers report. There were 511 total myocardial infarctions (heart attacks), 464 total strokes, and 509 cardiovascular deaths, with some men experiencing multiple events. A total of 1,661 men died during follow-up. Compared with placebo, neither vitamin E nor vitamin C had an effect on the prevention of major cardiovascular events. “Neither vitamin E nor vitamin C had a significant effect on total mortality, but vitamin E was associated with an increased risk of hemorrhagic stroke.”
In conclusion the authors write: “In this large, long-term trial of male physicians, neither vitamin E nor vitamin C supplementation reduced the risk of major cardiovascular events. These data provide no support for the use of these supplements for the prevention of cardiovascular disease in middle-aged and older men.”
Women who took beta carotene or vitamin C or E or a combination of the supplements had a similar risk of cancer as women who did not take the supplements, according to data from a randomized controlled trial in the December 30 online issue of the Journal of the National Cancer Institute. Epidemiological studies
Full Post: Vitamins C and E and beta carotene again fail to reduce cancer risk in randomized controlled trial
The Physicians’ Health Study II is a large-scale, long-term, randomized clinical trial that included 14,641 physicians who were at least 50 years old at enrollment. These physicians were given 400 IU of vitamin E every other day or its placebo, or 500 mg of vitamin C daily or its placebo. Researchers followed these patients for
Full Post: No evidence supporting the use of vitamin E and C in the prevention of cancer
In perhaps the largest cancer chemoprevention trial ever conducted, researchers have found that supplementation with vitamin E or selenium, alone or in combination, was not associated with a lower risk of prostate cancer or other cancers. This study, along with another cancer prevention study, will be published in the January 7 issue of JAMA, the
Full Post: Neither vitamin E nor selenium reduce risk of prostate cancer
Vitamin D deficiency - which is traditionally associated with bone and muscle weakness - may also increase the risk of cardiovascular disease (CVD). A growing body of evidence links low 25-hydroxyvitamin D levels to common CVD risk factors such as hypertension, obesity and diabetes, as well as major cardiovascular events including stroke and congestive heart
Full Post: Vitamin D deficiency could lead to heart problems
The temperature might not be the only thing plummeting this winter. Many people also will experience a decrease in their vitamin D levels, which can play a role in heart disease, according to a new review article in Circulation. Vitamin D deficiency results in part from reduced exposure to sunlight, which is common during cold
Full Post: Vitamin D deficiency may be a culprit in heart disease, high blood pressure and metabolic syndrome