Best Magnesium Supplements for Women — Ranked by Real Reviews
We read 3,000+ Reddit comments and 800 Amazon reviews. Here's what the data actually says.
Magnesium is the most talked-about supplement on r/supplements for a reason. Nearly 50% of women are deficient in it — and the symptoms are easy to mistake for just "being tired." Here are the forms and brands women kept coming back to.
Quick answers
What type of magnesium is best for sleep?
Magnesium glycinate is the best form for sleep. It's highly bioavailable and bonded to glycine, an amino acid with calming properties, making it gentler than oxide forms that often cause digestive issues.
When should I take magnesium for sleep?
Take magnesium 30–60 minutes before bed. Most women report noticing improved sleep quality within 1–2 weeks of consistent use.
How much magnesium should I take?
200–400mg of elemental magnesium per day. Start at 200mg and increase if needed. Check the label for elemental magnesium content, not total compound weight.
The brands women repurchase
Thorne Magnesium Glycinate
Highly bioavailable, NSF certified. The form Reddit keeps recommending for sleep.
Read full review →Doctor's Best High Absorption Magnesium
Chelated magnesium at a fraction of the price. Amazon's most-reviewed magnesium.
Calm Magnesium Powder
Magnesium citrate powder — drinkable, fast-acting, popular on r/Anxiety.
SOURCES +
- Abbasi B, et al. (2012). The effect of magnesium supplementation on primary insomnia in elderly. PubMed →
- Boyle NB, et al. (2017). The effects of magnesium supplementation on subjective anxiety. PubMed →
- National Institutes of Health — Magnesium Fact Sheet for Health Professionals. NIH Office of Dietary Supplements →
- r/supplements community discussion — Magnesium glycinate long-term use. Reddit r/supplements →