SupplementDuel

Magnesium Citrate

Sleep

Most affordable absorbable magnesium. Doubles as a mild laxative — useful if constipated, less ideal if not.

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Typical dose
200–400 mg elemental Mg
Evidence
Moderate (some RCTs)
Onset time
Acute: 1–3 hours
Half-life
—
Forms
Capsule, Powder, Tablet, Liquid
Source
synthetic
Best taken with
any time, with water
Best time of day
any
Bioavailability
4/5
Safety rating
4/5
Price per serving
$0.12
Vegan / GF / 3rd-party
✓ / ✓ / ✓
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Vetted brands, third-party testing, ships worldwide.

Common uses

  • • General magnesium repletion
  • • Constipation
  • • Sleep

Effect profile

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Common side effects

  • • Loose stools (often desired)
  • • GI cramps

Avoid if

  • • Severe kidney disease

Drug interactions

  • • Bisphosphonates

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Medical disclaimer

SupplementDuel is for educational purposes only and is not medical advice. Consult a physician before starting, stopping, or combining supplements.