Deficiency leads to pernicious anaemia. No toxic effects known. Involved in the formation of blood cells. Reduces the risk of NTDs in babies. Nuts, wholemeal bread, and fortified breakfast cereals are fair sources.
Deficiency leads to megaloblastic anaemia.
No known toxic effects. The body requires different amounts of each vitamin because each of them has a different function. People have different requirements too, according to their age, sex, level of activity and state of health. Table 3 shows the RNI values for some vitamins. Those people need to ensure they obtain adequate intakes by eating foods rich in particular vitamins.