Do You Have a Doctor That Can Interpret D Levels?

I take two types of D supplements. Can you talk about the differences and importance of each? I always try to emphasize to people have a discussion about laboratory results in a way that is interpreting the ranges because there's a quote normal range. So it goes back to this idea of the interpretation and going beyond just typical reference ranges for labs. And also, when you're looking at lab values, it's incredibly complex.