A high serum value can still carry clinical meaning even though there is no established upper intake limit for oral B12
Topical face products: Evening application allows overnight absorption without sun exposure concerns or makeup interference
Sikiric P, Gojkovic S, Krezic I, Smoday IM, Kalogjera L, Zizek H, Oroz K, Vranes H, Vukovic V, Labidi M, Strbe S, Baketic Oreskovic L, Sever M, Tepes M, Knezevic M, Barisic I, Blagaic V, Vlainic J, Dobric I, Staresinic M, Skrtic A, Jurjevic I, Boban Blagaic A, Seiwerth S
Discuss the risks and benefits with your doctor
Hoff G, Bernklev T, Johnsen L, Reitsma L, Sina D, Lauzike A, Gibbs C, Carlsen E, Lende TH, Narvestad JK, Kildahl R, Omdal R, Kvaly JT, Siland H
Some people can get a drop in potassium levels (hypokalaemia) when they start B12 treatment