Manganese & hair loss and food sources Feb 24, 2010 1:21:24 GMT -5 Quote Select PostDeselect PostLink to PostMemberGive GiftBack to Top Post by Mod on Feb 24, 2010 1:21:24 GMT -5 Prevents slow hair growth. Daily dose: 3-9 mg. Food sources: Whole grain cereals, eggs, avocados, nuts, seeds, beans, peas, fish, meat and chicken.