Mood
    Moderate Evidence

    Irritability Reduction

    Calmer temperament with improved patience and emotional regulation.

    TL;DR

    Irritability is usually a symptom of poor sleep, low blood sugar, alcohol or unmanaged stress rather than a nutrient gap. Fix those first; magnesium and L-theanine offer modest additional smoothing.

    Why It Matters

    Persistent irritability damages relationships and work performance and is a common presenting feature of depression, anxiety, perimenopause, thyroid disease and sleep apnoea. Treating the underlying condition resolves it far more reliably than symptomatic supplementation.

    How to Measure

    Biomarkers

    Sleep duration and quality
    Alcohol and caffeine intake
    PHQ-9 and GAD-7
    Thyroid function
    Meal timing

    Optimization Protocol

    Protect a consistent seven to nine hours of sleep, eat protein-containing meals at regular intervals to avoid glucose dips, cap alcohol and keep caffeine before midday. Add daily outdoor movement and a decompression routine. Magnesium glycinate at 200-400 mg in the evening and L-theanine at 100-200 mg are reasonable low-risk adjuncts. Seek assessment if irritability is persistent or escalating.

    Supporting Supplements

    Supporting Research

    Frequently Asked Questions

    Typical Timeframe

    2-6 weeks

    Research Summary

    Studies4
    Supplements3
    Evidence
    Moderate Evidence

    My Notes

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    This information is for educational purposes only. Always consult a healthcare professional before starting any supplement regimen.