Sleep Disorders✓ Fact-Checked

Best Magnesium Supplements for Sleep 2026

Magnesium glycinate is widely considered the best form for sleep due to its calming effects on the nervous system.

By Dr. Sarah Mitchell, PharmD, PharmD10 min readUpdated 6/23/2026

Overview

This guide provides comprehensive, evidence-based information on magnesium supplements. Our team has reviewed the latest research to bring you actionable insights.

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Frequently Asked Questions

Which magnesium is best for sleep?

Magnesium glycinate is generally recommended for sleep because glycine itself has calming properties and the form is well-absorbed without causing digestive issues.

How much magnesium should I take for sleep?

200-400mg of elemental magnesium 30-60 minutes before bed. Start with 200mg and increase if needed. The RDA for adults is 310-420mg/day total.

Can I take magnesium with melatonin?

Yes, magnesium and melatonin work through different mechanisms and can be safely combined. Many sleep formulas include both.

How long does magnesium take to work for sleep?

Some people notice effects the first night, but consistent benefits typically develop over 1-2 weeks of daily use.

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