The B comple vitamin are essential for normal metabolic funtions including hematopoisis.The B complex vitamins are necessary for the conversion of cabohydate,protien and fat into energy for the human tissue.The B Complex are readily absorbed form the gastrointrstinal tract,except in malasorbation syndromes.Water soluble vitamins ,B Complex, are not significantial tissu level excess quantities are excreted in urine.B Complex are rapidly depleted in conditions interfering with intake or absorption.