In a small Norwegian study, 17 people with irritable bowel syndrome logged food and symptoms for a week. Vitamin B6 was the only nutrient significantly tied to the symptom score, with lower intake accompanying more severe symptoms; median intake was 0.9 mg a day.
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Vitamin B6
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Vitamins
Too much folate may boost breast cancer risk - study
Among 70,656 postmenopausal women followed from 1992, 3,898 developed breast cancer, and those in the highest quintile of dietary folate intake had a 12% higher risk. The authors saw no dose-response trend, and found no link for vitamin B-6, B-12 or total folate.
Vitamins
B vitamins may help prevent cancer
In Cancer Epidemiology, Biomarkers & Prevention, the highest serum vitamin B2 and B6 levels were tied to 29 and 32 percent lower colorectal cancer risk, with no effect from B12. A separate EPIC analysis linked B6, methionine and folate to lower lung cancer risk.
Vitamins
B vitamins prevent dementia
In an Oxford trial, 168 volunteers with mild cognitive impairment took high-dose B12, folate and B6 for two years; brain shrinkage averaged 0.76 percent a year against 1.08 percent on placebo. Researchers did not test cognition, and a Dutch trial using lower doses found no benefit.
Nutrition
Vitamin B6 May Lower Cancer Risk
Comparing 899 lung cancer patients with 1,770 controls in the EPIC study, researchers found people with higher blood vitamin B6 had 56 percent lower risk and those with higher methionine 48 percent lower, across smokers, former smokers and non-smokers. Causality is unproven.
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.
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