A blood draw at the doctor's and a request to check B and D levels is not a bad idea. Might was well get the lipid panel, too, and whatever else the doc recommends. I always ask for a PSA, being an older male. If you have insurance, should all be free, part of your free annual. Otherwise, it's all BS.
I've taken a B12 for years. My doc found my D levels much too low and recommended a dosage to bring it up. It's fine now. PNW cyclists probably mostly have low D levels. We don't get out in the sun that much.
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Results matter
Last edited by Carbonfiberboy; 04-10-21 at 01:47 PM.