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Ashwagandha Liver and Thyroid Risks: What Is Known
Ashwagandha is a likely cause of rare, usually mild liver injury, according to NIH LiverTox, and Memorial Sloan Kettering links it to thyroid overactivity in reported cases. Most cases clear after stopping. Stallion Power lists it sixth of nine, at no more than 13.7 mg under the label rule, far below typical product doses.
Written by the Stallion Power label deskUpdated · 4 min read
The liver reports
Liver injury from ashwagandha is rare, but it is documented, so it deserves a plain look.
NIH LiverTox gives ashwagandha a likelihood score of B, meaning a likely cause of clinically apparent liver injury. It was not linked to enzyme rises in clinical trials. The cases came from commercial products, and mislabeling or contaminants may be involved (NIH LiverTox, Ashwagandha).
Onset is usually 2 to 12 weeks after starting. The pattern is typically cholestatic or mixed, with jaundice and itching. Most cases are mild to moderate and clear on their own. Recovery usually takes 1 to 4 months after stopping. Rare fatal cases or transplants occurred mainly in people with existing liver disease (NIH LiverTox, Ashwagandha). MSK and NCCIH also note liver injury cases (MSK, Ashwagandha) (NCCIH, Ashwagandha).
The thyroid reports
MSK says thyrotoxicosis, an overactive thyroid state, has been linked to ashwagandha supplements and resolved after stopping. It adds that the herb may increase thyroxine levels (MSK, Ashwagandha). NCCIH does not recommend it for people with thyroid or autoimmune disorders, and it notes a possible interaction with thyroid hormone medicines (NCCIH, Ashwagandha).
These are case reports and cautions. They do not give a rate, and they do not set a safe dose. NCCIH says ashwagandha may be safe for short periods, up to 3 months, and that long-term safety is not established (NCCIH, Ashwagandha).
| Topic | What the source says | Source |
|---|---|---|
| Liver | Likely cause of rare liver injury; onset 2 to 12 weeks | (NIH LiverTox, Ashwagandha) |
| Thyroid | Thyrotoxicosis reported; may raise thyroxine | (MSK, Ashwagandha) |
| Thyroid medicine | Possible interaction; not recommended with thyroid disorders | (NCCIH, Ashwagandha) |
| Sedatives | Possible added sleepiness with some sedatives and anticonvulsants | (MSK, Ashwagandha) |
| Pregnancy | Avoid | (MSK, Ashwagandha) (NCCIH, Ashwagandha) |
What this means for one gummy
Typical ashwagandha product doses are 150 to 600 mg, taken once to three times a day (NIH LiverTox, Ashwagandha). The Stallion Power label shows ashwagandha in place six of nine inside an 82 mg blend. The label rule lists heavier ingredients first (21 CFR 101.36, Supplement Facts). Caffeine in place five is printed at 5 mg, so ashwagandha weighs no more than 5 mg. The looser ceiling, 82 divided by 6, is about 13.7 mg.
That is arithmetic on a printed label, not a lab result. A real gummy can hold less. LiverTox does not describe liver risk at such a small, undisclosed amount (NIH LiverTox, Ashwagandha), and we do not claim it is risk-free. It is a reason the reports may not translate directly. See the ashwagandha page for more.
Anyone with liver disease, a thyroid condition, an autoimmune disorder, or hormone-sensitive prostate cancer. Also anyone pregnant or nursing, or taking thyroid, diabetes, blood pressure or sedative medicine (MSK, Ashwagandha) (NCCIH, Ashwagandha).
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See packsWarning signs and what to do
- Yellow skin or eyes, dark urine or itching: stop and call your doctor (NIH LiverTox, Ashwagandha).
- Unusual sleepiness: check your sedative medicine with a pharmacist.
The label also says to stop use and consult your doctor if any adverse reaction occurs. Keep taking prescribed medicine.
See the side effects guide for the common complaints. If a blood test checks thyroid or liver, tell the lab and doctor about every supplement.
Who wrote this01
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Pages built from the label, the sales page and linked NIH, FDA, FTC, NIDDK, AHA and peer-reviewed sources.
Last updated . See our editorial standards and how we check reviews. This website is run by Gostallionpower, a Stallion Power U.S. merchant desk, not by the manufacturer or the distributor named on the label. We earn money when you buy through our order links.
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