If you're 65 or older, expect to provide recent lab results - this isn't them being picky, it's them being responsible
and questions about self-medication for vitamin B12 deficiency
Am J PharmTech Res 2(5):138159 Muhammad N, Ullah S, Rauf A, Atif M, Patel S, Israr M, Akbar S, Shehzad O, Saeed M, Bawazeer S, Uddin MS (2021) Evaluation of the anti-diarrheal effects of the whole plant extracts of Cuscuta reflexa Roxb in pigeons
Intramuscular (IM) hydroxocobalamin injections bypass the intrinsic factor-mediated absorption mechanism, delivering the entire dose directly into circulation
Effects of zinc supplementation on markers of insulin resistance and lipid profiles in women with polycystic ovary syndrome: a randomized, double-blind, placebo-controlled trial
Ford JM, Hait WN, Matlin SA and Benz CC