Setsi sena se sebelisetsoa ho bona bongata ba vithamine B12 (VB12) ka har'a serum ea motho kapa lisampole tsa plasma in vitro.
Thepa e sebelisetsoa ho lemoha bongata ba ferritin (Fer) serum ea motho, plasma kapa lisampole tse felletseng tsa mali ka har'a vitro.