Celebrate the Winter Solstice with Vitamin D

Happy Holidays and Welcome to the Vitamin D Blog/Newsletter! I will attempt to keep you up on what I feel to be the most interesting vitamin D research. I have a very busy clinic in adult and pediatric rheumatology at The Arthritis Institute of Michigan in Brighton, Michigan, so my time available to … [Read more...]

Vitamin D Testing Errors Continue

A recent article in the New York Times highlighted an ongoing problem with the accuracy of vitamin D testing at the largest commercial clinical laboratory, Quest Diagnostics. It has become clear from shared experience among vitamin D experts, including myself, that Quest Diagnostics has a problem … [Read more...]