Guide
How much ashwagandha is too much?
No human trial has established a maximum safe ashwagandha dose. The highest tolerability trial went to 1,250 mg/day of an extract; a documented liver-injury case occurred at 1,350 mg/day of capsules — close to our own 1,300 mg/day label dose.
No human trial has set a maximum safe dose of ashwagandha, in any form. Our label directs two 650 mg capsules a day — 1,300 mg of root powder and 10 mg of black pepper. The highest-dose trial we found went to 1,250 mg/day of a concentrated extract and was well tolerated; separately, a documented case of liver injury occurred at 1,350 mg/day of capsules, a dose almost identical to ours.
What our label actually directs
Electric Tiger Ashwagandha's Supplement Facts panel lists 650 mg of organic ashwagandha root powder and 5 mg of organic black pepper fruit powder per capsule. The label directs one capsule twice a day — 1,300 mg of root powder and 10 mg of black pepper daily. Daily Value isn't established for either ingredient, which is normal for a whole-food ingredient without a set RDA.
What the highest-dose tolerability trial found
A 2012 open-label study gave 18 healthy adults an 8:1 aqueous ashwagandha extract in escalating amounts: 750 mg/day for 10 days, 1,000 mg/day for 10 days, then 1,250 mg/day for 10 days. All but one volunteer tolerated the full 30 days without an adverse event; one was withdrawn at the lowest dose for increased appetite, libido and hallucinogenic effects with vertigo. Organ function tests stayed normal throughout. That's the highest dose we found tested in a formal trial — and it's a concentrated extract, not root powder, so the milligram figure isn't a direct stand-in for our product.
The liver signal, at a dose close to ours
A 2023 case-report paper documented two people who developed liver injury linked to ashwagandha capsules. A 36-year-old man took 450 mg capsules three times daily — 1,350 mg/day, almost exactly our own daily amount — for six months before developing nausea, itching and dark urine; liver enzymes and bilirubin were elevated, and causality scoring rated ashwagandha as the "probable" cause. A second case, 450 mg for 45 days, showed a similar pattern. Both improved after stopping. A separate 2024 case report describes a healthy 22-year-old who developed liver injury within 30 hours of starting ashwagandha capsules, at an unreported dose. Liver injury from ashwagandha is rare — these are individual case reports, not a measured rate in a population — but the first case is the closest dose-matched safety data point in this file, and it's a caution, not a reassurance.
Stop and see a doctor for yellowing skin or eyes, dark urine, unusual itching, or pain under the right ribs. Anyone with existing liver disease should ask a doctor before using ashwagandha at all.
| Amount | What's known |
|---|---|
| 1,300 mg/day root powder (our label) | No dedicated trial at this exact dose and form in healthy adults |
| 1,250 mg/day extract (highest trial dose found) | Well tolerated in 18 healthy adults over 30 days, aside from one withdrawal |
| 1,350 mg/day capsules (case report) | Linked to "probable" liver injury after 6 months of daily use |
What "too much" tends to look like
A 2020 review pooling 30 human trials of ashwagandha root preparations found no serious adverse events and no meaningful changes in bloodwork across those studies. The adverse effects that did show up — mostly mild and temporary — were drowsiness, stomach discomfort and loose stools in more than 5% of participants, with decreased appetite, nausea, constipation and dry mouth reported less often. If you notice any of these, that's a reasonable signal to stop and reassess the dose, not push through it.
Questions people ask
Can you overdose on ashwagandha?
No trial has defined a toxic threshold, so we can't give you a specific overdose number. What we can say is that a documented liver-injury case occurred at 1,350 mg/day — close to our own daily dose — so "more than label directions" isn't a range with safety data behind it.
Is 1,000 mg or 1,200 mg of ashwagandha too much?
Both are below our own 1,300 mg/day label dose, and neither has a dedicated safety trial behind it as a standalone figure. No trial has established that any of these amounts is definitively safe or unsafe; the liver case above occurred at 1,350 mg/day, which is close enough to all of them that we wouldn't call any of these numbers a "safe zone."
Is ashwagandha toxic to the liver?
Most people who take it don't report liver problems, and a 2020 review of 30 human trials found no serious adverse events. But documented, causality-scored case reports of liver injury exist — including one at a dose close to ours — so it isn't nothing. See the liver-injury section above, and is ashwagandha bad for your liver? for the full picture.
What are ashwagandha overdose symptoms?
No trial has documented a formal overdose syndrome. The adverse effects seen at higher doses in the trials above were drowsiness, stomach upset and loose stools; the liver-injury cases showed nausea, itching, dark urine and jaundice. Any of the liver symptoms warrants seeing a doctor promptly.
Related reading: is it safe to take ashwagandha every day?, who should not take ashwagandha, and how much ashwagandha should you take a day.
Sources
- Herb-Induced Liver Injury by Ayurvedic Ashwagandha as Assessed for Causality by the Updated RUCAM: An Emerging Cause Two adults taking 450 mg ashwagandha capsules (one at 1,350 mg/day) developed liver injury judged 'probably' caused by the supplement, resolving after stopping it.
- Ashwagandha-Induced Hepatic Injury: A Case Report A healthy 22-year-old developed liver injury 30 hours after starting ashwagandha capsules; dose not reported.
- Exploratory study to evaluate tolerability, safety, and activity of Ashwagandha (Withania somnifera) in healthy volunteers In 18 healthy adults, an 8:1 ashwagandha extract at 750-1,250 mg/day for 4 weeks was mostly well tolerated, with one withdrawal for adverse effects; there was no placebo group to compare against.
- Safety and clinical effectiveness of Withania Somnifera (Linn.) Dunal root in human ailments Across 30 human trials of ashwagandha root preparations, no serious adverse events were reported; the most common mild effects were drowsiness, stomach discomfort and loose stools.
*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.
