I would not supplement without first testing.
If you lived in Greenland but ate shit loads of oily fish should you also take Vit D? Sun exposure is only one factor in Vit D levels.
I don't care enough to perform a double blind test, which according to @TW is the only meaningful basis on which make decisions.
I don't eat much fish at all, for a variety of reasons, which I why I take fish oil instead of vit d supplements.
What's the quantity of Vit D in fishoil vs. Vit D caps?
a double blind test is the only meaningful basis on which make decisions.
It's true. Evryteim.
@gillies started
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I would not supplement without first testing.
If you lived in Greenland but ate shit loads of oily fish should you also take Vit D? Sun exposure is only one factor in Vit D levels.