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.
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Vitamin A
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Vitamins
Antioxidants may help prevent breast cancer
An Indian study in the Asian Pacific Journal of Cancer Prevention measured plasma antioxidants in 225 women and found higher beta-carotene, vitamin E and vitamin C accompanying significantly lower breast cancer risk. Higher vitamin A levels went the other way, tracking with higher risk.
Vitamins
Vitamin A increases the presence of the HIV virus in breast milk (PR)
Two studies by University of Michigan epidemiologist Eduardo Villamor suggest vitamin A and beta-carotene supplements raise HIV levels in breast milk, possibly by increasing subclinical mastitis. He says the supplements do not look like a safe intervention for HIV-positive women.
Vitamins
Women at risk from vitamin A deficiency (Press Release)
Newcastle University researchers found that 29 of 62 women studied, 47 percent, carry a genetic variation that reduces how much vitamin A their bodies can make from beta-carotene. Dr. Georg Lietz says beta-carotene is not an effective substitute for many women.
Vitamins
Deficiency of vitamins A and C increases asthma risk
A Nottingham meta-analysis of 40 studies from 1980 to 2007 found people with low intake of vitamin C ran a 12 percent higher asthma risk and also had low vitamin A levels. Vitamin E intake showed no link, though people with severe asthma had very low blood levels of it.
Cancer
Vitamin A pushes breast cancer to form blood vessel cells
Georgetown researchers found that vitamin A applied to breast cancer cells switches on genes that push tumor stem cells to become endothelial cells able to build blood vessels. Senior author Stephen Byers calls it a disturbing hint that retinoid drugs might stimulate tumor growth.
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