Relationship of the intestinal bacterial flora to absorption.
D000818:Animals; D001419:Bacteria; D005492:Folic Acid / Q000096:biosynthesis; D006801:Humans; D007408:Intestinal Absorption; D007421:Intestine, Small / Q000382:microbiology*; D008286:Malabsorption Syndromes / Q000209:etiology; D014805:Vitamin B 12 / Q000378:metabolism
D005492:Folic Acid; D014805:Vitamin B 12