Blood test protocols for B12, Folate, Ferritin and D3

[Recon]

Do I need to be fasting when these test are done? I managed to get my GP to order them, so I don't have to pay privately. Small win there. She is not testing any thyroid (I had 3 tests already in the last month).

Thanks!

[SeasideSusie Remembering]

Iron tests should be done after a 12 hour fast according to the NHS

nhs.uk/common-health-questi...

[Recon in reply to SeasideSusie]

Thanks, and I know to stop my Thorne Basic B for a few days beforehand, but wasn't sure of anything else. I don't take iron.