Low vitamin D linked to MS risk: gene study
A major genetic study Tuesday confirmed a link between low vitamin D and a higher risk of multiple sclerosis (MS), a finding which experts say could lead to better treatment and prevention.
Previous observational studies have found an association between a person’s level of vitamin D, which comes from sunlight and from certain foods, and MS, a debilitating autoimmune disease that affects nerves in the brain and spinal cord, and has no known cause or cure.
But the problem with these studies was that they could not prove that low vitamin D caused MS, and may indeed have been showing simply that people who were sick tended to stay inside more and get less sunlight.
The latest study by Brent Richards, from McGill University, Canada, and colleagues published this week in PLOS Medicine, gets around that obstacle by analyzing the association between genetically reduced vitamin D levels and the likelihood of MS in a pool of 14,498 people with multiple sclerosis and 24,091 healthy controls.