Condition
    Moderate Evidence
    Effectiveness 3/5

    Omega-3 Fatty Acids for Hashimoto's Thyroiditis

    No trial has shown omega-3 supplementation lowers thyroid antibodies or alters hormone requirements in Hashimotos thyroiditis.

    Overview

    No trial has shown omega-3 supplementation lowers thyroid antibodies or alters hormone requirements in Hashimotos thyroiditis.

    Verdict

    Insufficient evidence

    How It Works

    Omega-3 fatty acids reduce Th1/Th17-skewed cytokine output and lower systemic inflammatory tone, mechanisms plausibly relevant to autoimmune thyroiditis.

    Dosing & Protocol

    Typical dose

    Recommended dose
    1000-2000mg EPA+DHA daily
    Expected timeframe
    Not established

    Protocol

    form
    Not applicable
    duration
    Not applicable
    co factor
    Evidence is insufficient: no controlled trial has shown that omega-3 lowers thyroid peroxidase antibodies, preserves thyroid function or reduces levothyroxine requirement in Hashimoto thyroiditis. The doses studied for general inflammation, 1000-2000 mg/day combined EPA+DHA, produced no thyroid-specific outcomes. Selenium has more (though still limited) antibody data, and levothyroxine is the treatment for the resulting hypothyroidism.
    titration
    Not applicable
    starting dose
    Not applicable as a treatment

    Evidence

    What the studies say

    Evidence is restricted to mechanistic reasoning and small observational associations between omega-3 status and thyroid autoimmunity. Selenium, not omega-3, is the intervention with actual antibody-lowering trial data.

    No studies are yet linked to both Omega-3 Fatty Acids and Hashimoto's Thyroiditis.

    Safety

    Caveats

    Do not adjust or stop levothyroxine - untreated hypothyroidism carries cardiac and, in pregnancy, fetal risk. Safety ceiling: below 3 g/day EPA+DHA without supervision; higher increases bleeding risk with anticoagulants and antiplatelets, and should be stopped before surgery. Separate any supplement containing iron or calcium from levothyroxine by four hours. Standard omega-3 doses are acceptable in pregnancy; avoid cod liver oil because of vitamin A.

    Less likely to help if

    Everyone with Hashimoto disease as far as thyroid outcomes go - no responder group has been shown.

    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.