Don Smith

Here is the question that must be answered. Does supplemental vitamin D have the same "biological potency" as does UVR-stimulated vitamin D?

Let's take three children.

- One girls mother was vitamin D insufficient during pregnancy, didn't use supplements and slathered on sunscreen every time she was in the sun from birth to age 18.

- One girls mother took vitamin D supplements during pregnancy and gave her vitamin D supplements from birth to age 18.

- One girls mother utilized controlled ultraviolet radiation exposure and took supplements during pregnancy and exposed her daughter to controlled doses of UVR and gave her vitamin D supplements from birth to age 18.

Which one do you predict (a) would be the healthiest, and (b) would be most likely to have a healthy child herself?

It's just common (alas, not so common) sense, folks.