That depends: The recommended daily allowance (RDA) of elemental iron is 10 mg for adult males, 15 mg for adult, pre-menopausal women, and 10 mg for postmenopausal women. Usual supplement dose is Regular-release ferrous sulfate: 325 mg orally 3 times a day or 300 mg orally 4 times a day may be given.
Answered 5/9/2017
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