how much magnesium should i take daily?
<answer> 1-3 years of age, 80 mg. 2 4-8 years of age, 130 mg. 9-13 years of age, 240 mg. <context> The daily Recommended Dietary Allowances for Magnesium (RDA) Are*. 1  1-3 years of age, 80 mg. 2  4-8 years of age, 130 mg.  9-13 years of age, 240 mg.