An editor's note on vitamin K, the fat-soluble vitamin behind blood clotting, bone mineralization and cell growth. Deficiency shows as easy bruising, nosebleeds and bleeding gums. Diets rich in green leafy vegetables track with lower osteoporosis, fracture and heart disease risk.
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Page 10 of 41
Vitamins
Research on vitamins A through K, deficiencies and supplementation.
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Vitamins
Vitamin C helps breast cancer survival - Breast Cancer Awareness Month
Swedish researchers found women with invasive breast cancer who took the most vitamin C before diagnosis were 25% less likely to die of breast cancer and 16% less likely to die of any cause than those taking the least. Taking 1 gram a day after diagnosis was not linked to survival.
Vitamins
Low vitamin D linked to type 2 diabetes mellitus
Pooling 21 prospective studies covering 76,220 people, Yiqing Song and colleagues found those with low serum vitamin D were 48% more likely to be diagnosed with type 2 diabetes. They note the link may run the other way and that trials are still needed.
Vitamins
Vitamin C reduces MSG induced liver injury
In a study in Experimental and Toxicologic Pathology, rats given high-dose MSG showed liver damage, while rats also given vitamin C had better liver tissue. The authors point to an ameliorative effect of vitamin C against MSG-induced liver injury.
Vitamins
Does a Bad Diet Cause Bad Behavior?
Mercola argues the gut works as a second brain and that depression and behavioural problems often trace to nutrient deficiencies or bacterial imbalance. He summarises a Weston A. Price Foundation article on vitamins, minerals, brain nutrients, processed food and excitotoxins.
Vitamins
Could vitamin C supplements increase kidney stone risk?
The author argues that studies linking vitamin C supplements to kidney stones are observational and cannot show cause, and that calcium ascorbate dissolves readily in urine at a normal pH near 7. A diet high in meat and low in vegetables lowers urine pH and raises stone risk.
Vitamins
Vitamin Intervention Could Save a Million Lives Annually
A Lancet series estimates 10 interventions, half of them micronutrient-based, could save close to a million lives a year: supplements and salt iodization in pregnancy for 102,000, vitamin A and zinc for children for 145,000, plus promotion of early and exclusive breastfeeding.
Vitamins
Vitamin E protects against heavy metal poisoning
Mice drinking water laced with lead, mercury, cadmium and copper for seven weeks developed severe biochemical and tissue liver damage. Vitamin E at 50 IU/kg five times weekly eased, but did not fully prevent, the injury, a Saudi study reports.
Vitamins
Vitamin D fights lung cancer?
Among 128,779 postmenopausal women in the Women's Health Initiative, never-smokers taking more than 800 IU of vitamin D a day were about 63 percent less likely to be diagnosed with lung cancer than those getting under 100 IU, researchers report in the Am J Clin Nutr.
Vitamins
Vitamin D helps prevent liver cirrhosis
A Chinese case-control study of 282 people with liver cirrhosis and 564 healthy controls found those with the highest serum vitamin D had about 65 percent lower odds of the disease. The authors suggest vitamin D might act as a protective factor.
Vitamins
Vitamin E not protective against radiation-induced damage - study
Rats given vitamin E before 15 Gy of gamma radiation preserved more parotid acinar cells, but not significantly more than other irradiated groups. The researchers concluded vitamin E seems to have failed as a radio-protective agent in rat parotid glands.
Vitamins
Tips for Resetting Your Internal Clock and Sleeping Better
Mercola links poor sleep to heart disease, ulcers, depression and cancer, notes magnesium, potassium and vitamin D deficiencies tied to specific sleep problems, and describes melatonin, made by the pineal gland in darkness, as central to the body's internal clock.
Vitamins
How Vitamin C and Other Nutrients Can Combat Exercise-Induced Side Effects
Mercola highlights a Finnish meta-analysis suggesting vitamin C may reduce exercise-induced bronchoconstriction by nearly half. Lead author Hemila says active people with exercise-related cough could reasonably test vitamin C, given its low cost and safety.
Vitamins
Antioxidants protect against dementia in elderly men
Among 3,385 men aged 71 to 93 in the Honolulu-Asia Aging Study, those using vitamin E and C supplements at baseline had 88% lower risk of vascular dementia and 69% lower risk of mixed or other dementia. No association appeared for Alzheimer's disease.
Vitamins
Vitamin E helps prevent Alzheimer's disease
Among 815 adults aged 65 and older followed for about four years, those in the highest fifth of vitamin E intake from food were 70 percent less likely to develop Alzheimer's disease, but only among people without APOE e4. Vitamin C, beta carotene and supplemental vitamin E showed no such link.
Vitamins
Prediagnostic vitamin C use helps breast cancer survival
Among 3,406 women in the Swedish Mammography Cohort diagnosed with invasive breast cancer, those in the highest quartile of pre-diagnosis vitamin C intake had a 25% lower risk of breast cancer death. Supplementing with 1,000 mg a day after diagnosis showed no survival benefit.
Vitamins
Vitamin D deficiency may cause type 1 diabetes mellitus
Among non-Hispanic whites, those with average serum vitamin D of 100 nmol/L or more were 44 percent less likely to develop type 1 diabetes over 5.4 years than those below 75 nmol/L, a Harvard-led study found. The association did not appear among blacks and Hispanics.
Vitamins
Sunshine makes you happy
Among 198 multiple sclerosis patients followed about 2.3 years, those reporting more sun exposure had lower depression and fatigue scores. Higher serum vitamin D was also tied to less depression, but less strongly. Neither was linked to anxiety or cognitive scores.
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