How much more evidence do we need before everyone with MS is on vitamin D supplements?

This time, researchers looking at 110 people with MS whose illness started before the age of 18, found that for every 25nmol/L the blood level of vitamin D was higher, there was a one-third reduction in relapse rate.

It is important to note that this was a group of young people with MS who were relatively deficient in vitamin D. The mean level of vitamin D for the group was only 55nmol/L, so there weren't many in the group who had adequate vitamin D levels.

Given the knowledge we have now had for many years about the pivotal role of vitamin D in modulating disease activity in MS, it is surprising to find such a large cohort of young people being looked after by neurologists and allowed to have persistently low vitamin D levels.

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