The distinction matters
In cases of deficiency: anaemia, digestive, neurological and psychological disorders Anaemia, characterized by insufficient iron in the blood, occurs frequently in people with a vitamin B12 deficiency
Its well-tolerated and considered safe when used under medical supervision
When you have been deficient and start on B12, the metabolism in all the cells of your body kicks into high gear and uses up the B12 fairly quickly
These nutrients are water-soluble, so the excess leaves your body through urine
ACS Appl Mater Interfaces 12(13):1550015506 Nguyen VT, Lee GJ, Ngo QT, Omelianovych O, Nguyen NA, Trinh VH et al (2021) Robust carbon-encapsulated Ni nanoparticles as high-performance electrocatalysts for the hydrogen evolution reaction in highly acidic media