Outcome
    Moderate Evidence

    5-HTP for Mood Stabilization

    Early trials suggested 5-HTP was comparable to some antidepressants, but the evidence base is old, small and methodologically weak.

    Overview

    Early trials suggested 5-HTP was comparable to some antidepressants, but the evidence base is old, small and methodologically weak.

    Verdict

    Mixed evidence

    How It Works

    5-HTP bypasses the rate-limiting tryptophan hydroxylase step to raise central serotonin synthesis directly.

    Dosing & Protocol

    Typical dose

    Recommended dose
    50-100 mg twice daily with food
    Expected timeframe
    2-6 weeks

    Protocol

    form
    Griffonia simplicifolia extract; consider enteric coating for nausea
    timing
    With food, morning and mid-afternoon
    duration
    6-8 week trial, then stop if no measurable change
    titration
    Increase to 100 mg twice daily after two weeks only if well tolerated
    measurement
    Weekly mood rating plus PHQ-9 at baseline and week 6
    starting dose
    50 mg twice daily with meals

    Evidence

    What the studies say

    A Cochrane review of 5-HTP and tryptophan for depression found only two of 108 identified trials of adequate quality, with a suggestive but unreliable benefit. Peripheral conversion to serotonin without a decarboxylase inhibitor causes nausea and limits central delivery.

    No studies are yet linked to both 5-HTP and Mood Stabilization.

    Safety

    Caveats

    The Cochrane review found only 2 of 108 trials adequate. Mood instability with a bipolar component can be worsened by serotonergic agents - get a diagnosis first. Never stack with SSRIs, SNRIs, MAOIs, tramadol or triptans. Not for use in pregnancy or breastfeeding.

    Less likely to help if

    People with bipolar spectrum illness, anyone on serotonergic medication, and those whose instability stems from sleep debt, alcohol or thyroid dysfunction.

    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.