Ashwagandha
Ashwagandha is generally safe at 300–600 mg/day, but high doses or long-term use may cause liver toxicity and thyroid disruption. Learn safe dosing and who should avoid this adaptogen.
Ashwagandha (Withania somnifera) extracts are commonly used at roughly 300–600 mg/day in many trials, though products vary widely. Case reports have linked high-dose or long-term use to liver injury in susceptible individuals, and thyroid hormone effects can occur—hyperthyroid symptoms are a documented concern in some contexts. Ashwagandha is also frequently stacked with other sedating herbs and magnesium, increasing side-effect overlap.
| Topic | Clinical signal | Stack note | Action |
|---|---|---|---|
| Liver injury | Case reports exist | Multiple supplements | Stop and seek care if jaundice |
| Thyroid | Hormone shifts possible | Levothyroxine users | Endocrine guidance |
| Pregnancy | Avoid unless OB directs | Historical concerns | Do not self-experiment |
| Sedation | Additive with sleep stacks | Alcohol risk | Avoid driving if drowsy |
Source: NIH ODS (ashwagandha) background; report serious adverse events to clinicians.
One adaptogen at a time. Stacking ashwagandha, rhodiola, and more raises side-effect noise.
Liver test symptoms. Dark urine, yellow eyes, or severe fatigue require urgent evaluation.
Thyroid labs if symptomatic. Palpitations, tremor, or heat intolerance warrant medical review.
Choose standardized extracts. Wild variability between brands affects both efficacy and risk.
Stress blends, sleep formulas, and testosterone-marketed products may include ashwagandha.
NutriAudit helps users who combine “calm” gummies with standalone ashwagandha capsules.
Ashwagandha can influence thyroid hormones in susceptible people; duplicate use with thyroid medication without labs is risky. Sedation stacks with other anxiolytics or sleep aids amplify drowsiness and falls in older adults.
Pregnancy guidance is generally conservative; do not extrapolate adaptogen hype into obstetric safety.
Hepatotoxicity case reports exist for various herbal blends containing ashwagandha—causality is hard to prove, but new jaundice or itching after starting a product should trigger stopping the supplement and urgent evaluation.
Rotate brands less, audit ingredients more: multiple adaptogen powders may list ashwagandha under proprietary blends with unclear totals.
Many tolerate it, but long-term high-dose use should involve clinician awareness—especially with liver or thyroid history.
Symptoms vary; discontinue and seek care if you feel unwell.
Sedation and serotonin-adjacent concerns exist—coordinate prescribing clinicians.
Check current anti-doping resources for your competitive level.
Use NutriAudit to audit your full stack for hidden overlaps.
Audit your supplement stackDisclaimer: NutriAudit is a decision-support tool designed to help you review your supplement stack for potential duplicate, conflicting, or excessive ingredients. It is not a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider before making changes to your supplement routine, especially if you are pregnant, nursing, taking medications, or have a medical condition.
Based on reference standards from FDA, EFSA, TGA, and MHLW.
Last updated: 2026-04-07 · Data sourced from FDA Dietary Reference Intakes, EFSA Scientific Opinions, and NIH Office of Dietary Supplements where applicable.