In a strange ruling, the U.S. Preventative Services Task Force now says not all Americans should be tested for low vitamin D levels. (NYT article here)
They agreed that most people are deficient. But they didn’t think the testing was very accurate, that different ethnic groups needed different levels, and that they weren’t sure supplementing with vitamin D did that much good.
Vitamin D deficiency isn’t harmless. “People with low vitamin D levels were more likely to die from cancer, heart disease and to suffer from other illnesses.” One study found people that used vitamin D had lower death rates across the board. But another one didn’t find that it made much difference.
Here in Maine, I’ve always thought testing for vitamin D was a bit foolish. Most Mainers are going to be short on vitamin D come March, and probably have too much of it come August. So unless you’re a snowbird, I think having a little in the winter months seems wise.