Word: vitamine
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...prestigious Archives of General Psychiatry offers a simple new hope for trichotillomania sufferers. In a small trial of 50 hair pullers, more than half of those who took an over-the-counter antioxidant called N-acetylcysteine, which is available in pill form at mainstream stores like GNC and Vitamin Shoppe, had improvement of symptoms after 12 weeks, compared with 16% of those taking a placebo. (See how to prevent illness...
That's how long it took Nayernia's team to nurture sperm from embryonic stem cells, using a special cocktail of growth factors, nutrients and retinoic acid, a derivative of vitamin A. It is worth noting that researchers could generate IVD sperm only from male embryos; when they tried using stem cells from a female embryo, they were unable to get sperm to mature past the spermatogonial stage. That suggests that genes located on the Y chromosome, which female cells do not contain, may be essential for triggering the maturation of the primitive sperm cell...
...addition to the question of how much vitamin D, there is debate over the best way to get it. About 10 to 15 minutes spent outside in full sun will give a fair-skinned person dressed only in his skivvies 10,000 to 20,000 IUs. Some vitamin-D advocates point to the vigorous use of sunscreen as the reason studies show that so many Americans don't get enough D. But we don't want taking advantage of the potential benefits of vitamin D to mean increased risk of contracting skin cancer. In addition to supplements, there are foods...
Turns out the debate about how much vitamin D we need has intensified over the past 10 years. One part of the discourse focuses on the growing body of research that points to numerous health benefits of the chemical (actually a hormone): it can help prevent rickets in children and severe bone loss in adults and potentially lowers the risk of multiple sclerosis, juvenile diabetes, cancer, heart disease, colds and influenza. (See the top 10 medical breakthroughs...
Amid all this new evidence, the Institute of Medicine (IOM) has assembled a panel of experts to re-evaluate just how much vitamin D we really need and can safely tolerate. Current IOM recommendations, set in 1997, are 200 IUs a day from birth to age 50 and a bit more after that. The upper limit of safety, according to the institute, is 2,000 IUs daily--too much can lead to, among other things, nausea and kidney stones--yet some vitamin-D proponents are pushing for up to 4,000 IUs a day for adults...