ARS physiologist Charles Stephensen is measuring how much vitamin D people need for health, including immune function. Season, latitude, time outdoors, skin pigmentation and clothing all shape how much the body makes; salmon, fortified milk, cereals and supplements supply the rest.
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Vitamins
Research on vitamins A through K, deficiencies and supplementation.
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Vitamins
Vitamin D Helps Prevent Mother-to-Child HIV Transmission
A Journal of Infectious Diseases study of 884 HIV-infected women in Tanzania found those with low vitamin D were 50 percent more likely to pass HIV to their infants by six weeks. Maternal vitamin D status was not linked to low birth weight or preterm birth.
Vitamins
Gene Therapy Could be The Cure for HIV/AIDS
At the 18th International AIDS Conference in Vienna, researchers said antiretrovirals suppress active replication but cannot eradicate HIV. A Berlin patient given a bone marrow transplant from a donor lacking the CCR5 receptor has been off drugs for two years, pointing toward gene therapy.
Vitamins
Children with celiac disease should take vitamins
University of Alberta researchers studied 43 children and teens with celiac disease and found low bone density, insufficient vitamin D and under half the recommended vitamin K intake. Diana Mager recommends both vitamins plus daily outdoor activity to protect their bones.
Vitamins
This Vital Vitamin Reduces Diabetes, High Blood Pressure, and Pre-eclampsia in Pregnancy by 30 Percent
British researchers writing in the British Journal of Nutrition made a "strong case" for advising pregnant women to take vitamin D, noting the UK was the only one of 31 countries not recommending it for women of reproductive age. Mercola urges testing 25-hydroxy D in pregnancy.
Vitamins
Alzheimer's - Could Super-Simple Remedy Treat Both?
Mercola cites a study in which 22 percent of participants who were depressed at the outset later developed dementia, against about 17 percent of those who were not, and suggests vitamin D may link the two. He notes omega-3 fats helped only depressed patients without an anxiety disorder.
Vitamins
The Cancer-Preventing Vitamin Your Doctor Is Likely Completely Clueless About
Dr. Cees Vermeer tells Mercola that almost no one gets enough vitamin K. Most people take in just enough for normal blood clotting, not enough for the protection researchers are studying against several cancers, arterial calcification, osteoporosis and dementia.
Vitamins
Canadians should take more vitamin D supplements
Osteoporosis Canada's updated guidelines call for 400 to 1,000 IU of vitamin D daily for adults under 50 and 800 to 2,000 IU for those over 50. The group says winter sunlight at northern latitudes is too weak to sustain production, and advises asking a physician about individual doses.
Vitamins
Vitamin E rich foods cut dementia risk
Among 5,395 Dutch adults aged 55 and over, those eating the most dietary vitamin E were 25 percent less likely to develop dementia over 9.6 years; vitamin C, beta carotene and flavonoids showed no link. Whether vitamin E itself lowered the risk remains unknown.
Vitamins
Low vitamin D linked with cognitive decline, Alzheimer's
David Llewellyn's team measured vitamin D in 858 people aged 65 and over and retested them at three and six years. Those severely deficient, below 25 ng/mL, were 60 percent more likely to show substantial cognitive decline and 30 percent more likely to decline on executive function.
Vitamins
Vitamin D deficiency linked to Alzheimer's disease
A Neurology study of 340 older adults receiving home care found those with insufficient 25(OH)D were 2.3 times more likely to have dementia, 2.5 times more likely to have Alzheimer's disease and twice as likely to have had a stroke. A separate review tied deficiency to lower cognitive scores.
Vitamins
Does Depression Cause Alzheimer's Disease? Vitamin D Helps Both!
A Neurology study of 949 Framingham participants found 22 percent of those depressed at the start developed dementia over 17 years, against about 17 percent of the rest. Author Jane Saczynski says the data cannot show whether depression causes dementia or the reverse.
Vitamins
High Doses of vitamin D result in lower blood pressure
In a small trial, type 2 diabetes patients given a single 100,000 or 200,000 IU dose of vitamin D3 showed moderately lower systolic blood pressure at eight weeks than those on placebo. Endothelial function, insulin resistance and HbA1c did not differ between groups.
Vitamins
Canada Virtually Eliminates Flu Deaths While U.S. Has Thousands
Over four years Canada recorded 16 flu-associated deaths among under-18s against 553 in the same US age group, a per-capita rate 3.2 times higher in the US. Mercola also cites research linking vitamin D levels of 38 ng/ml or more to fewer viral respiratory infections.
Vitamins
Nutrients protective against AMD
A study of 4,000 adults aged 55 to 80 found vitamin C, vitamin E, zinc, lutein, zeaxanthin and the omega-3 fats DHA and EPA protective against age-related macular degeneration when paired with a low-glycemic-index diet that releases glucose slowly.
Vitamins
Vitamin D fights HIV
Among 884 HIV-infected pregnant women in Tanzania followed about 69 months, those with serum vitamin D under 32 ng/mL were 25 percent more likely to progress to WHO stage III or worse and 47 percent more likely to develop severe anemia, a PLoS One study found.
Vitamins
Vitamin D boosts cognitive function
Tufts researchers analysed data on more than 1,000 home-care patients aged 65 to 99 and found those with sufficient vitamin D scored better on cognitive tests, particularly measures of executive performance such as reasoning and cognitive flexibility. Many participants were deficient.
Vitamins
New evidence: vitamin D prevents flu
A PLoS ONE study followed 198 healthy adults through autumn and winter: 16.6% of those who kept serum vitamin D at 38 ng/ml or higher caught a viral respiratory infection, against 45% of those with lower levels.
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