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%Begin Low vitamin D levels may increase odds of dementia - Harvard Health Harvard Health Publishing Harvard Health Publishing Open mobile menu Menu Close menu Close
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Low vitamin D levels may increase odds of dementia
October 1, 2022 By Maureen Salamon, Executive Editor, Harvard Women's Health WatchResearch we re watching
A study published online April 22, 2022, by The American Journal of Clinical Nutrition suggests vitamin D deficiency may raise risk for dementia and stroke. The study analyzed more than 294,000 people (most of them women over 60) living in the United Kingdom.
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Using blood tests on all participants and neuroimaging tools on about 34,000, researchers looked for associations between vitamin D levels and risks of dementia and stroke. A normal blood vitamin D level was defined as at least 50 nanomoles per liter (nmol/L); a deficiency was defined as less than 25 nmol/L. Low vitamin D levels were linked with an increased risk of both dementia and stroke over the following 11 years.
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Based on this observational study, people with low vitamin D levels were found to have a 54% greater chance of developing dementia compared with people whose levels were normal. Researchers acknowledged that these results do not prove that taking extra vitamin D, even if you have a low blood level, can prevent dementia or stroke.
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Talk to your doctor if you're concerned about your vitamin D levels. Image: © udra/Getty Images Share This Page Share this page to Facebook Share this page to Twitter Share this page via Email Print This Page Click to Print
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