Vitamin B12 helps to prevent pernicious anaemia caused by immature red blood cells and is important for the insulation and smooth conduction of signals along nerve cells. Vitamin B12 lowers homocysteine. It is also important for depression, sperm counts and MS. Intrinsic factor in the stomach is needed for absorption.
A deficiency of vitamin B12 can lead to vitamin B12 deficiency anemia; Fatigue, weakness, tiredness or light-headedness, rapid heartbeat and breathing, pale skin, sore tongue, easy bruising or bleeding, including bleeding gums, diarrhea or constipation. A lack of vitamin B12 is also associated with raised homocysteine levels.
Good food sources of vitamin B12 are; Milk, cheddar cheese, liver, snapper, salmon, cod, halibut and plain natural yogurt