another case-control study published in the same journal this past February offers physiologic plausibility by linking sun exposure & vitamin D levels to central nervous system demyelination.Now, if this was the first study demonstrating a link between vitamin D & MS, I'd urge caution. Remember, look for trends rather than flukes. However,
Furthermore, a twin-twin study published almost 3 years ago offers evidence of a genetic basis for seasonal regulation of vitamin D in those affected by MS. So, should we all start pumping up our vitamin D levels or at least enjoying the sunshine a bit more with the onset of summer? Unfortunately, it's still a bit early to make conclusive recommendations based upon associative & observational data. Remember that we still don't have cause & effect evidence, just the basis for developing a randomized controlled trial. And don't forget that sun exposure has been linked to skin cancer.