Is ashwagandha bad for your liver? What the research does and doesn't show

The evidence doesn't establish how often ashwagandha causes liver injury — case reports can document that it happened, not how common it is. What's documented: adults with no prior liver disease developing liver injury after starting ashwagandha capsules, in one case at a dose close to what many labels direct for daily use, and in another within 30 hours of starting.

What the evidence doesn't support

It doesn't support a conclusion about how frequently ashwagandha causes liver injury — the case reports below describe individual, documented occurrences, and case reports can't calculate a rate across everyone who takes the supplement. It also doesn't support ashwagandha as a benefit for the liver in any direction: no trial in the research we reviewed tested ashwagandha for fatty liver or any other liver condition, so there's no evidence it helps the liver either.

What the trials found

A 2023 report in Pharmaceuticals describes two new cases of ashwagandha-associated liver injury, assessed with the updated RUCAM causality scale, alongside a review of previously published cases. In the first, a 36-year-old man with no pre-existing liver disease took 450 mg ashwagandha capsules three times a day — 1,350 mg/day, close to what many single-ingredient labels direct — for 6 months, and developed hepatocellular-pattern liver injury scored "probable." In the second, a 30-year-old woman with no pre-existing liver disease took 450 mg capsules for 45 days and developed mixed-pattern liver injury, also scored "probable." Both improved after stopping. The same report reviews other published cases internationally, noting one that required a liver transplant.

A separate 2024 case report in Cureus describes a healthy 22-year-old woman with no prior liver disease who developed hepatocellular-pattern liver injury just 30 hours after starting ashwagandha capsules — dose not reported in the case. She improved with treatment over a 60-day period. The short time to onset in this case shows liver injury can appear quickly, not only after months of use.

None of these are controlled trials — they're documented individual cases, evaluated with a formal causality-scoring method (RUCAM) that concluded ashwagandha was the "probable" cause in each. That's a meaningfully different kind of evidence than a randomized trial: it tells us this can happen and has happened, not how likely it is for any individual person, or what makes some people susceptible and not others. No trial we reviewed has specifically studied ashwagandha's effect on liver function in a general healthy population over an extended period, so the true frequency of this effect — if there is one to measure — remains unknown.

Case	Dose & duration	Who	Outcome
Bokan 2023, Case 1	1,350 mg/day, 6 months	36-year-old man, no prior liver disease	Hepatocellular injury, "probable" (RUCAM); resolved after stopping
Bokan 2023, Case 2	450 mg capsules, 45 days	30-year-old woman, no prior liver disease	Mixed-pattern injury, "probable" (RUCAM); resolved after stopping
Almuzghi 2024	Dose not reported, onset at 30 hours	22-year-old woman, no prior liver disease	Hepatocellular injury; improved over 60 days

Questions people ask

Is ashwagandha bad for your liver?

It can be, in documented but rare cases. The evidence doesn't establish how common this is, but the case reports above describe real, confirmed instances in people with no prior liver disease — including at a dose many labels direct for daily use.

Does ashwagandha affect the liver?

Yes, in the documented cases above; a formal causality assessment scored ashwagandha as the "probable" cause in each. What isn't established is how often this happens, or why it happened to these individuals and not to everyone who takes ashwagandha.

Is ashwagandha good for fatty liver?

No trial we reviewed tested ashwagandha for fatty liver or any other liver condition, so the evidence doesn't support that either. If you have fatty liver disease or any other liver condition, that's a reason to ask a doctor before starting ashwagandha — the absence of a benefit finding isn't a reason to use it as a treatment for that condition.

Is ashwagandha hard on the liver?

The documented cases above suggest it can cause liver injury in some people, though the evidence doesn't tell us how many. It isn't a settled finding that ashwagandha is broadly hard on the liver for most people who take it — it's a documented, serious, but apparently uncommon risk.

When to talk to a doctor

Stop taking ashwagandha and see a doctor if you notice jaundice (yellowing of the skin or eyes), unusually dark urine, itching, nausea, or pain under the right ribs. If you have existing liver disease, ask a doctor before starting ashwagandha at all — it is not a treatment for any liver condition. See who should not take ashwagandha? for the fuller safety picture, and ashwagandha side effects for what else has been reported.