BioStacksBest Magnesium for Pregnancy
Top 4 products ranked
Clinical dose: 100–400 mg
How Magnesium supports pregnancy
Magnesium is a supporting nutrient for pregnancy support. Cofactor in over 300 enzymatic reactions including energy production, protein synthesis, and nervous system regulation. Magnesium glycinate is preferred for calm and sleep support with minimal GI effects, threonate (Magtein) crosses the blood-brain barrier for cognitive benefits, and citrate has a mild laxative effect useful for constipation. Oxide is cheap but poorly absorbed (~4%).
Effective dosing
Most evidence supports 100–400 mg of magnesium daily. Common clinical supplemental range; RDA for total intake is 310-420 mg. Products below this range may not deliver meaningful results.
Form and bioavailability
Avoid magnesium oxide — low absorption (~4%). Avoid magnesium stearate — filler, not a bioavailable form. Look for magnesium glycinate or magnesium citrate for better absorption.
Clinical research
Magnesium has strong clinical evidence for pregnancy benefits. Meta-analyses confirm benefits for blood pressure, sleep, and glucose; ~50% of adults may be subclinically deficient Learn more
Thorne
Basic Prenatal, 90 Capsules
Mixed forms · 90 mg
Solgar
Prenatal Nutrients
Mixed forms · 450 mg
Super Nutrition
Simply One, Prenatal Multivitamin with Super Greens, Spices, Vitamin A, and Folate, 90 Tablets
Mixed forms · 40 mg
Life Extension
Bone Restore with Vitamin K2
magnesium oxide · 300 mg