During pregnancy, aim for total magnesium near the RDA and keep supplemental magnesium at or below 350 mg elemental per day.

Women over 70 generally need 320 mg of magnesium per day from all sources.

For children’s sleep, aim for daily magnesium from food that matches age-based needs; supplements aren’t a sleep fix for most kids.

For torsades de pointes, give magnesium sulfate 2 g IV, then repeat or infuse as needed based on rhythm and risk.

For magnesium glycinate, daily elemental magnesium limits are 65 mg (1–3 y), 110 mg (4–8 y), and 350 mg (9–18 y).

For healthy adults, up to 350 mg per day of elemental magnesium from magnesium glycinate is generally considered safe.

For women over 50, magnesium glycinate usually means 100–350 mg elemental magnesium daily, guided by diet and a 350 mg supplement limit.

The magnesium glycinate dose for blood pressure usually sits around 200–400 mg of elemental magnesium per day, kept within the 350 mg supplement UL.

Most adults should keep magnesium glycinate to 350 mg of elemental magnesium per day from supplements unless a clinician advises otherwise.

For sleep support, many adults use 100–200 mg elemental magnesium as glycinate at night without crossing 350 mg/day from supplements.