Condition
    Effectiveness 2/5

    Magnesium for Nervousness

    Magnesium shows a small benefit for subjective anxiety in some trials, concentrated in people with low intake or high stress.

    Overview

    Magnesium shows a small benefit for subjective anxiety in some trials, concentrated in people with low intake or high stress.

    Verdict

    Mixed evidence

    Low risk and cheap, but the evidence is weak and inconsistent.

    How It Works

    Magnesium antagonises NMDA receptors and supports GABAergic transmission; deficiency increases neuronal excitability and HPA axis reactivity.

    Dosing & Protocol

    Typical dose

    Recommended dose
    200-400mg elemental magnesium daily
    Expected timeframe
    4-6 weeks if it works at all.

    Protocol

    form
    Magnesium glycinate
    notes
    Take in the evening if using for sleep onset
    duration
    6 weeks, then judge
    titration
    Up to 400mg
    starting dose
    200mg elemental daily

    Evidence

    What the studies say

    A 2017 systematic review of 18 trials found suggestive but low-quality evidence for magnesium reducing subjective anxiety, particularly in mildly anxious and premenstrual populations. Most trials were small, used varied salts and doses, and combined magnesium with vitamin B6, which confounds attribution. No trial in diagnosed generalised anxiety disorder has shown a clinically meaningful effect. Dietary intake is below recommendations in a large share of adults, which keeps the hypothesis alive without confirming it.

    Magnesium supplementation and subjective anxiety: a systematic review

    Score: 6/10
    2017
    systematic_review

    Boyle NB, Lawton C, Dye L

    Existing evidence is suggestive of a beneficial effect of Mg on subjective anxiety in anxiety vulnerable samples. However, the quality of the existing evidence is poor.

    View source

    Safety

    Caveats

    Diarrhoea is dose-limiting with oxide and citrate. Accumulates in reduced kidney function — avoid without advice if eGFR is low.

    Less likely to help if

    People with adequate dietary magnesium and no deficiency risk.

    Medical Disclaimer

    The information provided on this website is for educational and informational purposes only and is not intended as a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or other qualified health provider with any questions you may have regarding a medical condition or before starting any supplement regimen.

    Individual results may vary. The statements on this website have not been evaluated by the Food and Drug Administration. Products and information are not intended to diagnose, treat, cure, or prevent any disease.