Children hospitalized with asthma problems typically had low blood levels of vitamin D, echoing a 2006 Australian study in which sunlight eased asthma severity in mice. The Journal of Allergy and Clinical Immunology reports maternal supplementation may cut children's asthma risk.
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Vitamins
Research on vitamins A through K, deficiencies and supplementation.
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Vitamins
Nutrient protection against arsenic toxicity
Among 165 six-year-olds in Bangladesh, researchers found that shortfalls in folate and the amino acid cysteine may hinder arsenic metabolism, which depends on two methylation steps. The children appeared to metabolize and excrete arsenic more efficiently than adults.
Vitamins
Nutritionist says antioxidants imperative for exercisers
In a University of Jena study, diabetics given 1,000 mg of vitamin C and 400 IU of vitamin E before exercise did not show the expected mopping up of damaging oxygen molecules; researchers suspect the supplements short-circuit the body's own response. One nutritionist calls it too early to conclude.
Vitamins
Folic acid linked to reduced risk of preemie births
A University of Texas study of 35,000 women found those taking folic acid for a full year before conception were 50 percent less likely to deliver before 37 weeks, 70 percent less likely to have a spontaneous birth at 20 to 28 weeks and 50 percent less likely at 28 to 32 weeks.
Vitamins
B6 cuts colorectal risk
A Harvard study links adequate vitamin B6 to as much as a 60% lower colorectal cancer risk, above the 20% reduction earlier Scottish trials estimated. Patients with colorectal cancer showed high homocysteine, which tracks with low B6 and B12.
Vitamins
Nutrient protection against arsenic toxicity
Researchers measuring urinary arsenic metabolites and blood micronutrients in 165 six-year-olds in Bangladesh report that low folate and cysteine may hamper arsenic methylation, and that children appear to metabolize and excrete arsenic more efficiently than adults.
Vitamins
Vitamin C shown to prevent gout
An Archives of Internal Medicine study followed 46,994 men for 20 years and found gout risk fell as vitamin C intake rose: 34 percent lower at 1,000 to 1,499 mg a day and 45 percent lower above 1,500 mg. It counted 1,317 new gout cases over the period.
Vitamins
Reduced form of CoQ10 shown more effective
A NaturalNews report says ubiquinol, the reduced form of CoQ10, absorbs better than ubiquinone. Texas researchers who could not maintain adequate blood plasma CoQ10 on high doses of the unreduced form saw levels rise 22 to 39 percent once patients were given ubiquinol.
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.
Vitamins
B vitamins fight migraines
In a six-month trial at Australia's Genomics Research Center, 52 diagnosed migraine sufferers took either folic acid with vitamins B6 and B12 or a placebo. Those on the vitamins cut homocysteine 39% while controls saw no change, and migraine disability fell from 60% to 30%.
Vitamins
Vitamin D theory of autism
Dr. John Cannell of the Vitamin D Council sets out his theory that vitamin D deficiency during pregnancy or childhood causes autism, arguing it fits the rise in cases alongside sun avoidance and the patterns among twins, boys and black children. He calls it an unproven but disprovable theory.
Vitamins
CoQ10 prevents pre-eclampsia in pregnant women
In an Ecuadorian placebo-controlled trial, pregnant women took 200 mg of CoQ10 daily from 20 weeks' gestation; pre-eclampsia occurred in 14 percent of them against 25.6 percent on placebo. Researchers say more study is needed to explain how the antioxidant helps.
Vitamins
Health Benefits, Consequences of Folic Acid Dependent on Circumstances
Two Nutrition Reviews articles by Omar Dary and Joel Mason weigh folic acid's benefits against its risks: folate protects against some cancers and neural tube defects, but because it drives DNA synthesis, abundant intake may also speed the growth of pre-cancerous and cancerous tumors.
Vitamins
Vitamin B and folic acid may reduce AMD risk
In a trial of 5,205 women at high heart-disease risk, those randomly assigned folic acid plus vitamins B6 and B12 for an average of 7.3 years were 34 percent less likely to develop age-related macular degeneration and 41 percent less likely to develop visually significant AMD than those on placebo.
Vitamins
Prenatal Vitamin B12 deficiency raises risk of birth defect
In 1,200 Irish women studied in Pediatrics, those with vitamin B12 in the lowest quartile were five times more likely to have a baby with a neural tube defect; the authors suggest keeping levels above 300 ng/L before pregnancy. PCRM notes vegans can meet the need with supplements.
Vitamins
Low Serum vitamin D level means high risk of prostate cancer death
Among 160 prostate cancer patients followed about 44 months, men with medium vitamin D levels were 67 percent less likely, and those with high levels 84 percent less likely, to die of the disease than men with low levels, a Norwegian study in the British Journal of Cancer found.
Vitamins
Vitamin C injections slow tumor growth in mice
NIH researchers injected high-dose ascorbate into rodents carrying brain, ovarian and pancreatic tumors and cut tumor weight and growth rate by roughly half, tracing the effect to hydrogen peroxide forming around the tumors. Normal cells were unaffected.
Vitamins
Micronutrients Protect against Arsenic Lesions
A cross-sectional study using baseline data from the Health Effects of Arsenic Longitudinal Study in Araihazar, Bangladesh, is the first population-based attempt to link micronutrient intake to arsenic-induced skin lesions. It weighed B vitamins and vitamins A, C and E among 10,628 people.
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