The Institute of Medicine's Food and Nutrition Board set the vitamin D RDA at 600 IU for children, adults up to 70 and pregnant women, citing bone health as the only benefit it could document. Dr. John Cannell and Carole Baggerly argue in interviews that people need far more.
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Vitamins
Research on vitamins A through K, deficiencies and supplementation.
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Vitamins
Are the new vitamin D recommendations good enough?
The Institute of Medicine panel now advises 600 IU of vitamin D daily up to age 70 and 800 IU after 71, saying most Americans and Canadians already get enough. Critics dispute the deficiency figures and note few of the dozen-plus panelists research vitamin D.
Vitamins
Sunshine, vitamin D supplements needed to prevent breast cancer
Among 67,721 French women followed a decade, dietary and supplemental vitamin D alone showed no link to breast cancer, but in the sunniest regions the highest intakes came with 32 percent lower risk. The authors suggest a threshold of exposure from both sun and diet is needed.
Vitamins
Vitamin D deficiency and diseases
Nimitphone and Michael Holick recommend at least 400 IU of vitamin D daily for children and 2,000 IU for adults, defining deficiency as 25-hydroxyvitamin D below 20 ng/ml. They link low levels to cancer, heart disease, type 2 diabetes, autoimmune and neurological conditions.
Vitamins
Vitamin supplements benefit HIV carriers
Harvard researchers measured vitamin A in six-week-old infants born to HIV-positive women and found those in the highest quartile were 49 percent less likely to die by 24 months. A separate study ties efavirenz and zidovudine use to vitamin D deficiency.
Vitamins
Dr. Robert Heaney To Host Meeting In London (PR)
A notice for a private London meeting hosted by Dr. Robert Heaney covering the evidence on vitamin D, the IOM report on dietary reference intakes for calcium and vitamin D, and treating deficiency. Space is limited to 30 people and must be confirmed in advance.
Vitamins
Depression linked to diabetes: What is the missing link?
An Archives of Internal Medicine study by An Pan's Harvard team found women with depression were 17% more likely to develop type 2 diabetes and those on antidepressants 25% more likely, while women with diabetes were 29% more likely to become depressed. Cause remains unknown.
Vitamins
Vitamin D deficiency does not increase stroke risk among blacks
Among 7,981 adults, whites deficient in vitamin D were twice as likely to die of stroke as those with higher levels, but no such link appeared among blacks, who were 60 percent more likely to die of stroke overall. Deficiency was far more common in blacks, 32 percent against 7.
Vitamins
Vitamin D helps prevent Alzheimer's disease
Rats with Alzheimer's disease fed a vitamin D-free diet did worse in the Morris water maze than those on a vitamin D-supplemented diet, Iranian researchers report. Supplementing 1,25(OH)2D3 did not significantly change maze performance; the authors say patients should be protected from inadequacy.
Vitamins
Vitamin D good for asthma patients
The Lancet reported an 18-year-old whose asthma attack followed viewing his ex-girlfriend's Facebook profile, though experts say any stress could trigger one. A separate study found people low in vitamin D 50 percent more likely to need hospital care for an attack.
Vitamins
Should Facebook users take vitamin D to prevent asthma attacks?
The Lancet reported the case of an 18-year-old with otherwise well-controlled asthma who had an attack after viewing his ex-girlfriend's Facebook pages, and recovered after quitting the site. The article adds that studies link low vitamin D to poorer asthma control.
Vitamins
Vitamin D deficiency means higher death risk in diabetes patients
France's health insurance body attributes as many as 500 deaths over 30 years to the withdrawn diabetes drug Mediator, and regulators want former patients checked for valve damage. A Danish study of 289 type 2 patients tied severe vitamin D deficiency to far higher death risk.
Vitamins
Acne drug may boost suicide risk by lowering serum vitamin D
A BMJ Online First study following 5,700 patients with severe acne found suicide risk was already raised years before isotretinoin treatment and peaked in the six months after it ended, which researchers tie partly to disappointing results. They urge monitoring for a year after treatment.
Vitamins
Vitamin D deficiency means higher death risk in Type 2 diabetes patients
Among 289 type 2 diabetes patients followed 15 years in Denmark, those with severe vitamin D deficiency, below 13.9 nmol/L, were 103 percent more likely to die of any cause and 95 percent more likely to die of cardiovascular disease than patients with higher levels.
Vitamins
Should Jane Fonda take vitamin D to prevent breast cancer recurrence?
After Jane Fonda disclosed that a non-invasive breast tumor had been removed, this piece points to a Journal of Clinical Oncology study of 512 women with early breast cancer in which vitamin D deficiency was linked to 94 percent higher recurrence and 73 percent higher risk of death.
Vitamins
Influenza, Flu Shots, and Vitamin D
Answering a reader who asks whether to get a flu shot or take vitamin D, Dr. Cannell says he does not know, but has come to believe vitamin D may be at least as protective as flu shots, while noting no head-to-head comparison has been done.
Vitamins
Vitamin C saves a man with swine flu
A Mercola post on a New Zealand News3 report. Doctors said dairy farmer Allan Smith could not survive severe swine flu and moved to end life support, but his family hired a lawyer to force the hospital to give high-dose intravenous vitamin C.
Vitamins
High intake of dietary vitamin E may reduce dementia risk
Rotterdam researchers followed 5,395 people aged 55 and older for about a decade and found those in the highest third of dietary vitamin E intake were 25 percent less likely to develop dementia. Vitamin C, beta carotene and flavonoids showed no link once confounders were taken into account.
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