<prompt> Iron absorption from intestine is regulated by -Acid secretion in stomachReducing substances in foodMucosal block in the intestinal cells in according to iron requirementAlkaline medium in small intestine  <response>: The iron absorption is based on Mucosal block in the intestinal cells in according to iron requirement. REF. PARKS TEXTBOOK OF PREVENTIVE AND SOCIAL MEDICAL 21ST EDITION. PAGE NO - 623 