Ashwagandha has become one of the most popular herbal supplements in the world.
Millions of people take it daily for stress relief, better sleep, hormone support, and improved energy.
But a growing body of case reports is raising an important question: what are the ashwagandha side effects on the liver?
Before you start — or continue — this supplement, here is what the science actually says.
What Is Ashwagandha and Why Do People Use It?
Ashwagandha (Withania somnifera) is a root herb that has been central to Ayurvedic medicine for over 3,000 years.
It is classified as an adaptogen, meaning it is thought to help the body cope with physical and emotional stress.
Today, it is sold in capsules, powders, gummies, and liquid extracts across health stores and online marketplaces worldwide.
Its popularity is undeniable — but its safety record is not as clean as many supplement brands suggest.
Can Ashwagandha Cause Liver Damage?
Yes, in documented cases, it can.
Multiple peer-reviewed case reports have confirmed instances of drug-induced liver injury (DILI) directly linked to ashwagandha use (1).
Ashwagandha has been officially linked to liver damage in rare but severe cases, according to the National Center for Complementary and Integrative Health (NCCIH) (2).
Patients in these reports developed elevated liver enzymes, jaundice, and other signs of hepatotoxicity following consistent supplementation.
After stopping the supplement, liver function recovered to normal in most documented cases.
What Does the Research Say?
A case report published in the Journal of Clinical and Translational Hepatology described a patient who developed cholestatic liver injury after several weeks of ashwagandha use (3).
A separate case documented in the American Journal of Case Reports detailed acute liver failure in a young man who had been taking high-dose ashwagandha for bodybuilding purposes (4).
Researchers point to withanolides — the active bioactive compounds in ashwagandha — as a possible hepatotoxic trigger, particularly at elevated concentrations.
Contamination and undisclosed additives in low-quality products are also considered contributing factors.
Dose, duration of use, and individual genetic metabolism all appear to influence who is most at risk.
Symptoms of Ashwagandha Liver Side Effects
If you experience pale stools, dark urine, or yellowing of the skin or eyes, stop taking ashwagandha right away and see a doctor.
Persistent fatigue, pain in the upper right abdomen, nausea, vomiting, or unexplained itching of the skin are also warning signs that should not be ignored.
Symptoms can appear within weeks of starting supplementation or following a dose increase.
Early action significantly reduces the risk of lasting liver damage.
What Organs Does Ashwagandha Affect?
When it comes to ashwagandha side effects, the liver is the main organ to be concerned about.
The kidneys may also be affected, particularly with prolonged high-dose use over several months.
Ashwagandha is known to raise thyroid hormone levels, specifically T3 and T4, which can be problematic for people with existing thyroid disorders.
It also influences cortisol output, reproductive hormones, and blood sugar regulation — making it a far more systemic herb than its "calming supplement" label implies.
Who Should Avoid Ashwagandha?
Ashwagandha is not appropriate for everyone, and certain groups carry a meaningfully higher risk of adverse effects.
Anyone with a pre-existing liver or kidney condition should avoid it entirely without direct medical supervision.
People currently taking hepatotoxic medications, thyroid drugs, blood thinners, or immunosuppressants should consult their physician before use.
Pregnant and breastfeeding individuals should also avoid ashwagandha, as its safety in these populations has not been established.
What is considered safe?
Most clinical research has used standardized root extract at 300 to 600 mg per day, taken for 8 to 12 weeks (5).
Doses at or above 1,000 mg per day appear more frequently in the adverse event literature and carry a higher risk profile.
There is currently no universally established long-term safe upper limit for ashwagandha.
Many practitioners recommend cycling off the supplement every 8 to 12 weeks to reduce the risk of accumulation-related harm.
Why Don't Doctors Always Recommend It?
Long-term human safety data for ashwagandha remain limited, with most trials being short-term and involving small participant groups.
The supplement industry operates under significantly looser regulatory standards than pharmaceutical drugs, which means product quality, potency, and purity can vary widely between brands.
The documented cases of serious liver injury — though rare — are sufficient cause for many clinicians to withhold a blanket endorsement.
Professional vigilance is further justified by the possibility of drug interactions, especially with liver, thyroid, and hormone-related drugs.
How to Take Ashwagandha Safely
If you choose to use ashwagandha, selecting a product with third-party certification from NSF International, USP, or Informed Sport is the most important first step.
Begin at 300 mg per day and do not increase the dose without guidance from a qualified healthcare provider.
Avoid combining ashwagandha with alcohol, acetaminophen, or other supplements known to place stress on the liver.
Consider getting a baseline liver function panel before starting and repeat it after 8 weeks of consistent use.
Stop immediately and seek medical attention if any liver-related symptoms develop during your supplementation period.
Final Thoughts
The danger begins when ashwagandha is regarded as a safe herb.
Although most people tolerate it well at standard dosages, there are recorded cases of significant liver damage that cannot be dismissed as statistical noise.
The risk is manageable — but only with the right product, the right dose, proper monitoring, and an honest conversation with your doctor.
If you are in good health, have no liver or thyroid concerns, and choose a rigorously certified supplement, ashwagandha can be a genuinely useful tool in your wellness routine.
But if you fall into a higher-risk category, the potential cost to your liver is not worth the benefit.
Supplement with intention, not assumption — and always let a healthcare provider weigh in before you start.
🌿 Ready to supplement smarter? Shop our liver-safe, third-party tested ashwagandha — because your health deserves better than guesswork.
FAQs
Can ashwagandha damage your liver?
Yes. High doses or prolonged use have been linked to drug-induced liver injury (DILI) in documented case reports.
What are the symptoms of ashwagandha liver damage?
Look for jaundice, dark urine, nausea, fatigue, and upper abdominal pain. Stop use immediately and see a doctor if these appear.
How much ashwagandha is safe to take daily?
300–600 mg of root extract per day is the clinically studied safe range. Do not exceed this without medical supervision.
What organ is ashwagandha hardest on?
The liver. It is the primary organ responsible for metabolizing ashwagandha's compounds, making it the most vulnerable to adverse effects.
Why don't doctors recommend ashwagandha?
Limited large-scale clinical trials, risk of liver injury, and potential interactions with thyroid and sedative medications make most doctors cautious.
Related Studies
1. Title: Ashwagandha-induced liver injury – A case series from India and literature review
Summary: This multicenter case series describes several patients with ashwagandha-related drug-induced liver injury, typically presenting as cholestatic hepatitis and occasionally progressing to acute-on-chronic liver failure, and reviews previously reported cases.
Link: https://pubmed.ncbi.nlm.nih.gov/37756041/
2. Title: Ashwagandha-Associated Acute Liver Injury: A Case Report and Literature Review
Summary: This report presents a 77‑year‑old woman with acute liver injury after three weeks of ashwagandha use and notes prior literature cases in which ashwagandha-associated injury progressed to acute liver failure requiring transplantation.
Link: https://biomedres.us/fulltexts/BJSTR.MS.ID.009719.php
3. Title: Ashwagandha
Summary: This NIH NCCIH monograph summarizes what is known about ashwagandha’s uses, safety profile, and adverse effects, noting case reports of liver injury and the need for caution in people with liver disease.
Link: https://www.ncbi.nlm.nih.gov/books/NBK548536/
4. Title: Ashwagandha-Induced Hepatic Injury: A Case Report
Summary: This case report describes a previously healthy young woman who developed mixed but predominantly cholestatic liver injury after taking ashwagandha capsules, with other causes of liver disease excluded.
Link: https://www.cureus.com/articles/263978-ashwagandha-induced-hepatic-injury-a-case-report
5. Title: A prospective, randomized double-blind, placebo-controlled study of safety and efficacy of a high-concentration full-spectrum Ashwagandha root extract in reducing stress and anxiety in adults
Summary: In this trial, adults received 300 mg of ashwagandha root extract twice daily (600 mg/day) for 60 days and reported improved stress outcomes, with no serious adverse events and only mild, comparable side effects to placebo.
