A meta-analysis in Stroke found women with the highest vitamin D levels were 49 to 59 percent less likely to suffer ischemic stroke than those with the lowest. The authors call the association modest and say adequate vitamin D status may lower women's stroke risk.
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Page 21 of 41
Vitamins
Research on vitamins A through K, deficiencies and supplementation.
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Vitamins
Better Analysis Methods for Vitamin D
USDA chemist Craig Byrdwell at the Beltsville Human Nutrition Research Center developed triple-parallel mass spectrometry and paired liquid chromatographs to measure vitamin D and its metabolites in foods and supplements more precisely.
Vitamins
Little Sunshine Mistakes that Can Give You Cancer Instead of Vitamin D
Dr. Mercola argues sun exposure is essential for vitamin D but must be timed to avoid burning. He explains UVB alone triggers vitamin D3 production while UVA raises skin cancer risk, advises against soaping skin right after exposure, and recommends raw aloe vera for burns.
Vitamins
Vitamin D deficiency boosts risk of type 2 diabetes in pre-diabetes people
In a Swedish study of 2,378 adults, men in the highest quartile of 25(OH)D had lower odds of developing type 2 diabetes, an effect confined to those with prediabetes. In both sexes, progression from prediabetes to diabetes fell about 25 percent per 10 nmol/L increase.
Vitamins
Optimal levels of vitamin D during pregnancy
John Cannell describes Bruce Hollis's randomized trial, which gave 350 pregnant women 600, 2,000 or 4,000 IU of vitamin D a day. Only the 4,000 IU group came close to producing infants at 20 ng/ml, the lowest level the 2010 Food and Nutrition Board calls adequate for fetal health.
Vitamins
Why You Need More of this Crucial Vitamin if You Are Heavy
Mercola reports on mathematical modelling suggesting body weight, not body fat, sets how much vitamin D a person needs: a heavily muscled man and an obese man of the same weight would need the same amount. Heavier people are still likely to need more than slimmer ones.
Vitamins
Taking vitamin E does not impact women's heart failure risk (PR)
In the Women's Health Study, nearly 40,000 healthy women aged 45 and over took 600 IU of vitamin E or placebo every other day for an average 10.2 years, and researchers found no overall effect on heart failure risk. They say prevention should target blood pressure instead.
Vitamins
Vitamin C cuts Radiation-Induced Cancer Risk
Of 16 men who worked 5 to 6 weeks in a contaminated area at Fukushima, the four given intravenous vitamin C beforehand plus antioxidant supplements throughout showed no significant change in blood chemistry, free DNA or 47 cancer-related genes. Three who went without showed elevated risk.
Vitamins
Vitamin C, E supplements may fight gastric or esophageal cancer
In a 15-year follow-up of the Shandong Intervention Trial reported in JNCI, Jun-Ling Ma's team found patients given vitamin C, vitamin E and selenium were about 50 percent less likely to die of gastric or esophageal cancer. Garlic treatment showed no statistically significant effect.
Vitamins
Ignore This Deficiency... And Become 3 Times More Likely to Die?
Mercola summarizes an analysis of more than 10,000 patients in which people with low vitamin D were more likely to have diabetes, high blood pressure and diseased heart muscle, and three times more likely to die of any cause. He urges readers to get a 25(OH)D blood test.
Vitamins
This Vitamin Might Ease Menstrual Cramps
Women with relatively low vitamin D who took a single 300,000 IU dose of D3 had a significant drop in menstrual cramp pain. Mercola advises regular dosing or sun exposure rather than mega-doses, and links vitamin D to lower prostaglandin and cytokine production.
Vitamins
Vitamin D may help prevent stress fracture - study
Researchers followed 6,712 girls aged 9 to 15 for seven years and found those in the top quintile of vitamin D intake were about 51 percent less likely to suffer a stress fracture. Dairy and calcium intakes showed no association with fracture risk.
Vitamins
Vitamin D deficiency linked to higher mortality in female nursing home residents
Among 961 Austrian nursing home residents averaging 83.7 years, 92.8% had vitamin D below recommended levels and 284 died over a mean 27 months. The lowest levels went with the highest mortality, which the authors say warrants immediate action.
Vitamins
How could vitamin D may help Alzheimer's disease? (PR)
UCLA researchers incubated macrophages from Alzheimer's patients with amyloid beta and vitamin D3, and identified the genes and signaling networks through which the vitamin may help immune cells clear the protein. The Journal of Alzheimer's Disease published the work.
Vitamins
Vitamin D or exposure to sunshine may boost athletic performance
A report in the December 2011 Asian Journal of Sports Medicine says a growing body of evidence suggests vitamin D plays a role in athletic performance. Author B. Hamilton notes vitamin D receptors turn up in muscle tissue, indicating the vitamin affects skeletal muscle structure and function.
Vitamins
Infant heart failure and vitamin D supplementation
In the first randomized trial of vitamin D for infants with chronic congestive heart failure, 80 infants in Egypt received 1,000 IU a day or placebo alongside standard care. Ejection fractions in the vitamin D group became normal, the writer reports.
Vitamins
How Vitamin D Inhibits Inflammation (PR)
National Jewish Health researchers report in the Journal of Immunology that vitamin D levels considered adequate blocked inflammatory signaling in human white blood cells while low levels did not. Lead author Elena Goleva says deficient patients may benefit from supplements.
Vitamins
Should Pregnant Women Avoid Using Cell Phones?
Chinese researchers exposed pregnant rats to cell phone radiation and reported significant neurological differences in fetal brains, concluding a certain dose causes harm. Earlier work tied handset use two or three times a day in pregnancy to more hyperactivity and conduct problems at school age.
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