Daily How Much

For magnesium deficiency, adults often take 200–400 mg elemental magnesium per day, split doses, with a clinician directing the plan.

Daily magnesium for women over 40 is 320 mg; don’t exceed 350 mg from supplements unless a clinician advises it.

Most adults start with 5–10 sprays of magnesium oil per day (about 100–200 mg elemental), then adjust based on comfort and total intake.

Most adults use 400–600 mg per day of magnesium for migraine prevention; start low, split doses, and stay within safety limits.

For heart palpitations, adults need 310–420 mg/day from diet; supplemental doses beyond 200 mg/day should be guided by a clinician.

Adults typically need 310–420 mg of magnesium a day to support heart rhythm, blood pressure, and overall cardiovascular function.

For women in midlife, target 320 mg/day from all sources, and keep supplemental magnesium at or below 350 mg/day.

For daily magnesium oxide intake, cap at 350 mg elemental magnesium from supplements unless your clinician advises otherwise.

Start with 10–20 sprays of topical magnesium per day (about 120–240 mg elemental magnesium), then adjust to comfort and goals.

For magnesium L-threonate, most adults use 1.5–2 grams per day in split doses, supplying about 100–144 mg elemental magnesium.