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Strong Evidence😴

Best Magnesium for Sleep in Australia

Essential mineral involved in 300+ enzymatic reactions including sleep regulation and stress response. Compare prices across Australian retailers and find the best value.

Full Magnesium profile — evidence, interactions & all conditions

Quick Summary

Dosage

200-400 mg/day

Time to Effect

1-2 weeks

From

$0.10/serve

Evidence

strong (4/5)

Timing: Take 30-60 minutes before bed

Clinical Evidence

The effect of magnesium supplementation on primary insomnia in elderly

PMID: 23853635
RCT2012n=46

Magnesium supplementation resulted in significant increases in sleep time, sleep efficiency, and melatonin concentration, with significant decreases in insomnia severity.

The Effect of Magnesium Supplementation on Primary Insomnia in Elderly

PMID: 23853635
Double-blind RCT2012n=46

Supplementation with 500mg magnesium daily for 8 weeks significantly improved subjective insomnia measures (ISI), sleep time, sleep efficiency, and melatonin concentration.

How Does Magnesium Help with Sleep?

Magnesium activates the parasympathetic nervous system, regulates GABA receptors, and helps regulate melatonin production.

Magnesium glycinate or threonate forms are preferred for sleep.

This link is supported by 2 clinical studies, with the evidence rated as strong overall. With an effectiveness rating of 4/5, Magnesium is one of the top-rated supplements for sleep.

Best Prices in Australia

Magnesium Glycinate 250g

BulkSupplementsviaBulkSupplements

1000mg per serve · 250 serves · powder

$0.10/serve

$24.99 total

Buy
2

Magnesium Caps 500mg, 100 Capsules

Life ExtensionviaLife Extension

500mg per serve · 100 serves · capsule

$0.19/serve

$18.99 total

Buy
3

Magnesium Glycinate 200 mg, 180 Tablets

NOW FoodsviaiHerb

200 mg per serve · 180 serves · tablet

$0.41/serve

$36.51 total

Buy
4

Life Extension Neuro-Mag L-Threonate

Life ExtensionviaLife Extension

144mg Mg (as threonate) per serve · 90 serves · Capsule

$0.47/serve

$42.00 total

Buy
5

Garden of Life Whole Food Magnesium

Garden of LifeviaGarden of Life

350mg per serve · 60 serves · Tablet

$0.54/serve

$32.50 total

Buy

Showing top 5 of 6 products. View all

Interactions to Watch

  • Blood pressure medicationsmoderate— Magnesium may enhance the blood pressure-lowering effect of antihypertensive medications.
  • Bisphosphonates (osteoporosis drugs)moderate— Magnesium can reduce absorption of bisphosphonates.
  • Antibiotics (tetracyclines, quinolones)moderate— Magnesium can bind to certain antibiotics and reduce their absorption.
Check all interactions

Other Supplements for Sleep

Melatonin

strong evidence

L-Theanine

moderate evidence

Valerian Root

moderate evidence

Glycine

moderate evidence

View complete Sleep supplement guide

Magnesium for Other Goals

Magnesium for Stress & Anxiety(moderate)

Frequently Asked Questions

How much Magnesium should I take for sleep?
The recommended dose of Magnesium for sleep is 200-400 mg per day. Magnesium glycinate or threonate forms are preferred for sleep. Always consult a healthcare professional before starting supplementation.
When is the best time to take Magnesium for sleep?
Take 30-60 minutes before bed. Consistency matters more than exact timing — take it at the same time each day for best results.
How long does Magnesium take to work for sleep?
Most people notice effects within 1-2 weeks. Individual results vary depending on baseline levels, dosage, and overall health. Consistent daily use is important — don't expect overnight results.
What form of Magnesium is best for sleep?
Magnesium is available as capsule, tablet, powder, liquid. Powder forms often offer the best value per serve and can be mixed into drinks.
Where can I buy Magnesium for sleep in Australia?
You can buy Magnesium from BulkSupplements, Life Extension, iHerb, Garden of Life and more in Australia. The best value we found is Magnesium Glycinate 250g at $0.10 per serve from BulkSupplements.
Is Magnesium safe? Are there any interactions?
Magnesium is generally considered safe at recommended doses. However, it can interact with Blood pressure medications, Bisphosphonates (osteoporosis drugs), Antibiotics (tetracyclines, quinolones). Always check with your doctor if you take medications, especially before combining supplements.

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This information is for educational purposes only and is not medical advice. Consult a healthcare professional before starting any supplement regimen. SuppUp earns affiliate commissions from qualifying purchases — this does not affect our recommendations.