Editorial roundup · Updated 2026

Best Magnesium for Constipation & Sleep

Magnesium citrate does two useful things at once: softens stools overnight, and measurably improves sleep depth. It's the second thing to try after fiber.

How we picked

We prioritized bioavailability, taste, and per-serving cost.

  1. #1 Editor's pick
    Calm Magnesium Citrate — Natural Vitality

    Natural Vitality

    Calm Magnesium Citrate

    The best-selling magnesium powder — 325 mg per scoop

    4.6

    $0.60 / serving

    • Two-purpose: fixes constipation AND improves sleep
    • Citrate form has the best bioavailability + laxative action
    • Pleasant citrus flavor — easier than horse-pill magnesium tablets
    • Too high a dose = loose stools (start with half a scoop)

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