some new research shows a connection between multivitamins and breast cancer
http://www.webmd.com/breast-cancer/n...st-cancer-risk
also, they cause premature births
http://www.reuters.com/article/idUSTRE63D40J20100414
vitamin myths
Last year, researchers published new findings from the Women's Health Initiative, a long-term study of more than 160,000 midlife women. The data showed that multivitamin-takers are no healthier than those who don't pop the pills, at least when it comes to the big diseases—cancer, heart disease, stroke. "Even women with poor diets weren't helped by taking a multivitamin," says study author Marian Neuhouser, PhD, in the cancer prevention program at the Fred Hutchinson Cancer Research Center, in Seattle.
In 2007, researchers analyzed a raft of studies going back several decades and involving more than 11,000 subjects to arrive at a disappointing conclusion: Vitamin C didn't ward off colds, except among marathoners, skiers, and soldiers on subarctic exercises.
An analysis of seven vitamin E trials concluded that it didn't cut the risk of stroke or of death from heart disease. The study also scrutinized eight beta-carotene studies and determined that, rather than prevent heart disease, those supplements produced a slight increase in the risk of death. Other big studies have shown vitamin C failing to deliver. As for B vitamins, research shows that yes, these do cut homocysteine levels …but no, that doesn't make a dent in heart danger.
Don't take these pills, the American Heart Association says. Instead, the AHA offers some familiar advice: Eat a varied diet rich in fruits, vegetables, and whole grains.
The old thinking went something like this—sure, vitamin pills might not help you, but they can't hurt either. However, a series of large-scale studies has turned this thinking on its head, says Demetrius Albanes, MD, a nutritional epidemiologist at the National Cancer Institute.
http://www.rd.com/living-healthy/5-v...cle175625.html