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evidence · mechanism · dose
Supplements/Herb

Ashwagandha (Thyroid Support)

Supports T4→T3 conversion in subclinical hypothyroid adults.

Thyroid SupportHormone OptimizationCortisol Management

Overview

Supports T4→T3 conversion in subclinical hypothyroid adults.

Natural sources
    Common forms

      Mechanism of action

      Adaptogenic action on HPA-HPT axis; may upregulate type 1 deiodinase.

      Pathways

        Effects on the body

        Organ system effects

        Evidence-based benefits

        Raised T4 and T3 in subclinical hypothyroidism (Sharma 2018)

        Limited evidence

        Potential side effects

        Common
          Rare
            Serious
            • · Hyperthyroidism worsening — caution

            Drug interactions

            Thyroid hormone replacement
            Monitor TSH.
            moderate

            Safety & non-supplemental interactions

            Educational summary — always confirm with your clinician or pharmacist before starting, stopping, or combining with prescription therapy.

            Avoid if you are
            • ·Pregnant or breastfeeding (insufficient safety data)
            • ·Children under 18 (unless directed by a clinician)
            Avoid / monitor with these medications
            • ·Alcohol, benzodiazepines, opioids, sedating antihistamines (additive CNS depression)

            Supplement interactions

            Pairs well with

            None listed.

            Avoid combining with

            No specific avoidances listed.

            Dosing & bioavailability

            Typical dose
            300–600 mg KSM-66 BID
            With food?
            Optional

            Where to buy

            Affiliate-style search links to reputable retailers. We don't endorse specific brands — verify third-party testing (USP, NSF, Informed Sport) before purchase.

            Herb
            Ashwagandha …
            Amazon
            Wide selection · fast shipping
            Herb
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            iHerb
            Global delivery · curated brands
            Herb
            Ashwagandha …
            Thorne
            Practitioner-grade · NSF tested

            Scientific evidence (8)

            RCTJ Altern Complement Med · 2018

            Ashwagandha in subclinical hypothyroidism

            Sharma AK, et al.

            8-week RCT of ashwagandha 600 mg/d.

            Key findings

            Normalized TSH, T3, and T4 vs placebo.

            Open study
            Systematic reviewPubMed (NLM) · 1970

            PubMed: Ashwagandha (Thyroid Support) — Raised T4 and T3 in subclinical hypothyroidism

            Live PubMed search

            Live results for "Ashwagandha (Thyroid Support) Raised T4 and T3 in subclinical hypothyroidism" across the PubMed/MEDLINE peer-reviewed index.

            Key findings

            Opens current human and preclinical literature matching Ashwagandha (Thyroid Support) and "Raised T4 and T3 in subclinical hypothyroidism". Filter by RCT, meta-analysis, or year on the results page.

            Open study
            Systematic reviewPubMed (NLM) · 1970

            PubMed: Ashwagandha (Thyroid Support) — randomized controlled trial

            Live PubMed search

            Live results for "Ashwagandha (Thyroid Support) randomized controlled trial" across the PubMed/MEDLINE peer-reviewed index.

            Key findings

            Opens current human and preclinical literature matching Ashwagandha (Thyroid Support) and "randomized controlled trial". Filter by RCT, meta-analysis, or year on the results page.

            Open study
            Systematic reviewPubMed (NLM) · 1970

            PubMed: Ashwagandha (Thyroid Support) — meta-analysis

            Live PubMed search

            Live results for "Ashwagandha (Thyroid Support) meta-analysis" across the PubMed/MEDLINE peer-reviewed index.

            Key findings

            Opens current human and preclinical literature matching Ashwagandha (Thyroid Support) and "meta-analysis". Filter by RCT, meta-analysis, or year on the results page.

            Open study
            Systematic reviewPubMed (NLM) · 1970

            PubMed: Ashwagandha (Thyroid Support) — pharmacokinetics

            Live PubMed search

            Live results for "Ashwagandha (Thyroid Support) pharmacokinetics" across the PubMed/MEDLINE peer-reviewed index.

            Key findings

            Opens current human and preclinical literature matching Ashwagandha (Thyroid Support) and "pharmacokinetics". Filter by RCT, meta-analysis, or year on the results page.

            Open study
            Systematic reviewPubMed (NLM) · 1970

            PubMed: Ashwagandha (Thyroid Support) — safety adverse events

            Live PubMed search

            Live results for "Ashwagandha (Thyroid Support) safety adverse events" across the PubMed/MEDLINE peer-reviewed index.

            Key findings

            Opens current human and preclinical literature matching Ashwagandha (Thyroid Support) and "safety adverse events". Filter by RCT, meta-analysis, or year on the results page.

            Open study
            Systematic reviewPubMed (NLM) · 1970

            PubMed: Ashwagandha (Thyroid Support) — dose response

            Live PubMed search

            Live results for "Ashwagandha (Thyroid Support) dose response" across the PubMed/MEDLINE peer-reviewed index.

            Key findings

            Opens current human and preclinical literature matching Ashwagandha (Thyroid Support) and "dose response". Filter by RCT, meta-analysis, or year on the results page.

            Open study
            Systematic reviewGoogle Scholar · 1970

            Google Scholar: Ashwagandha (Thyroid Support) — clinical evidence

            Live Scholar search

            Cross-database citation index for Ashwagandha (Thyroid Support) as it relates to "clinical evidence".

            Key findings

            Includes preprints, theses, and journal articles. Useful for tracking citation counts and follow-on work.

            Open study
            Educational use only. This profile is not medical advice. Consult a qualified healthcare professional before starting any supplement, especially if you take prescription medication or have a chronic condition.