Research linking low vitamin D levels with autism, asthma, dementia, cancers, and numerous other health conditions keep rolling in. Almost every week another article is published on the importance of this valuable nutrient. Doctors now test for vitamin D levels and often expect to find a deficiency.
What’s going on? While it’s true that many people spend less time in the sun than decades ago, it seems there must be more to it than just lack of enough sunshine.