Magnesium
Essential mineral involved in 300+ enzymatic reactions including sleep regulation and stress response.
How it works
Mechanism of Action
Magnesium activates the parasympathetic nervous system, regulates GABA receptors, and helps regulate melatonin production.
Evidence-based uses
What Magnesium Is Used For
Magnesium glycinate or threonate forms are preferred for sleep.
Clinical Evidence
Magnesium supplementation resulted in significant increases in sleep time, sleep efficiency, and melatonin concentration, with significant decreases in insomnia severity.
Supplementation with 500mg magnesium daily for 8 weeks significantly improved subjective insomnia measures (ISI), sleep time, sleep efficiency, and melatonin concentration.
Magnesium glycinate is preferred for calming effects.
Clinical Evidence
Systematic review of 18 studies found magnesium supplementation (200-400mg/day) reduced subjective measures of anxiety, with strongest effects in those with mild-to-moderate anxiety and low baseline magnesium.
Safety
Interactions & Warnings
Magnesium may enhance the blood pressure-lowering effect of antihypertensive medications.
Magnesium can bind to certain antibiotics and reduce their absorption. Take at least 2 hours apart.
Magnesium can reduce absorption of bisphosphonates. Take at least 2 hours apart.
Compare prices
Buy Magnesium in Australia
10 products compared across Australian retailers. Sorted by price per serve.
| Product | Price | /serve | |
|---|---|---|---|
Best BulkSupplements Magnesium Glycinate 250g BulkSupplements | $24.99 | $0.10 | Buy |
NOW Foods Magnesium Glycinate 200 mg, 180 Tablets iHerb | $22.99 | $0.13 | Buy |
Life Extension Magnesium Caps 500 mg, 100 Capsules Amazon AU | $17.49 | $0.17 | Buy |
Life Extension Magnesium Caps 500mg, 100 Capsules Life Extension | $18.99 | $0.19 | Buy |
Good Health Magnesium Easy-to-Swallow 90 Capsules HealthPost | $29.95 | $0.33 | Buy |
Life Extension Life Extension Neuro-Mag L-Threonate Life Extension | $42.00 | $0.47 | Buy |
Blackmores Magnesium Muscle Ease 150g Powder Chemist Warehouse | $24.99 | $0.50 | Buy |
Garden of Life Garden of Life Whole Food Magnesium Garden of Life | $32.50 | $0.54 | Buy |
Thorne Magnesium Bisglycinate 200mg, 60 Capsules Thorne | $39.99 | $0.67 | Buy |
Bioceuticals Bioceuticals Ultra Muscleze Aussie Health Products | $39.95 | $0.67 | Buy |
Prices in AUD. Some links are affiliate links — we may earn a commission at no extra cost to you.
Should you take Magnesium?
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This information is for educational purposes only and is not intended as medical advice. Always consult a healthcare professional before starting any supplement. Evidence ratings are based on peer-reviewed clinical research. Individual results may vary.