Originally Posted by
Carbonfiberboy
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.
Might be low now but should be good in the fall/winter after riding in the summer. I had mine done in Dec once and it was still good. Low in Apr though after being bundled up. Vitamin D lasts in the system for a while.