Folic Acid (folacin) is essential for red ~blood~ cell formation and gene formation. Its sources are |liver|, |kidneys|, dark green leafy |vegetables|, wheat germ, and dried lima beans. The USRDA for an adult male is 400 micrograms (mcg.), for an adult female 400 mcg., for adolescents 400 mcg., and for infants and young children 30-300 mcg.