Food source: Leafy green vegetables, legumes, beans, nuts, lentils, whole grains, asparagus.
Functions: Necessary for DNA & RNA synthesis, which is essential for the growth and reproduction of all body cells; essential to the formation of red blood cells by its action on the bone marrow; aids in amino acid metabolism.
Deficiency: Anaemia, smooth red tongue, diarrhea, constipation, infections, weakness, confusion.
Toxicity: Diarrhea, sleeping problems, can mask a B12 deficiency