Which is better Vitamin D2 or Vitamin D3?

Easter is a Lunar Holiday or Moveable Feast. It falls on the Sunday after the first full moon of spring. Yes our lives and celebrations are still tied to this SOLAR system. I have had recurring questions about vitamin D2 and D3, so I thought I would repeat an old commentary from past blogs, D2 or … [Read more...]

D2 or Not D2? That is the Question

The short answer is Not D2. There are two forms of vitamin D you can purchase as supplements, vitamin D2 (ergocalciferol, Drisdol the RX form of D) and D3 (cholecalciferol, no RX version paid for by insurance). D2 comes from plants. D3 is made by mammals from cholesterol with the assistance of … [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...]