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Green Tea Extract Side Effects: The Liver Question
Green tea extract side effects can include stomach upset and, rarely, liver injury, mostly reported with concentrated pills rather than brewed tea. Stallion Power lists green tea extract fourth in its 82 mg blend, so one gummy holds at most about 19 mg by our arithmetic. Stop and call a doctor if warning signs appear.
Written by the Stallion Power label deskUpdated · 4 min read
The concern01
Can green tea extract cause liver problems?
Yes, in rare cases. Liver injury has been reported with green tea extract pills, and it is the main safety concern with the ingredient (NCCIH, Green Tea).
The U.S. Pharmacopeia reviewed these reports and advises taking green tea extract with food (USP 2020, green tea extract liver review). The National Center for Complementary and Integrative Health says brewed tea is not tied to the same problem, and notes that extracts also contain caffeine and may lower levels of the heart drug nadolol (NCCIH, Green Tea).
So the question is not "tea or no tea". It is "how much extract, how concentrated, and what else are you taking".
Cup vs pill02
Is green tea extract riskier than drinking green tea?
The reports come from concentrated extract products, not from a cup of tea.
| Form | Safety note |
|---|---|
| Brewed green tea | Not linked to the liver reports (NCCIH, Green Tea) |
| Extract pills | Rare liver injury reported; take with food (USP 2020, green tea extract liver review) |
| Extract also carries | Caffeine; possible nadolol interaction (NCCIH, Green Tea) |
A gummy is a third form. No source we found tests green tea extract at gummy doses, so we cannot extend the pill findings or the tea findings to it.
On the label03
How much green tea extract is in Stallion Power?
The label does not say. Green Tea Extract is line four of the 82 mg blend, which caps it near 19 mg by our arithmetic.
The parts of a blend must run from most to least by weight (21 CFR 101.36 (proprietary blends)). Caffeine is printed at 5 mg in fifth place. Lines one to four share at least 57 mg. If the blend were split evenly in order, line four would come to about 19 mg. That is a ceiling from the label order, not a lab test.
A small share is not the same as zero risk. Anyone with liver disease, or who takes nadolol, should ask a clinician first. The label also warns people on medicine or with a medical condition to consult a doctor. Keep taking prescribed medicine (FDA, Mixing medications and supplements).
Stallion Power: from $49 a bottle30 gummies · 2, 3 or 6 bottles · free shipping on 3 or 6 · 60-day guarantee
See packsStop signs04
When should you stop a supplement and call a doctor?
Stop at once and call a doctor if you notice yellow skin or eyes, dark urine, strong stomach pain or unusual tiredness.
The label says to discontinue and consult your doctor if any adverse reaction occurs. You can also report a reaction to FDA (FDA, How to Report a Problem with Dietary Supplements). The panel below lists the signs and the emergency line.
- Chest pain, fainting or a racing heartbeatStop and call 911. Do not wait to see if it passes.
- An erection lasting more than four hoursGo to an emergency room now. This needs urgent care to protect the penis.
- Dizzy or faint when you stand, especially on blood-pressure or nitrate medicineSit or lie down, stop the gummy and call your doctor before the next one.
- Rash, swelling or hivesStop. Trouble breathing or a swollen face or throat needs 911.
- Yellow skin or eyes, dark urine or belly painStop and call your doctor the same day. Liver problems have been reported with some herbal extracts.
- Cramps or loose stoolsSorbitol and the other ingredients can upset the stomach. Stop if it continues and ask your doctor.
Call 911For chest pain, trouble breathing, a swollen face or throat, or if someone passes out.
Priapism guidance (NHS, Priapism); supplements and medicines (FDA, Mixing medications and supplements); liver reports (NIH ODS, Ashwagandha).
More on the nine lines sits on the ingredients page, and the green tea and caffeine page has the profile.
Want to try Stallion Power? Both packs ship free, and both come with the 60-day guarantee (all bottles returned, even empty ones).
Prices on the sales page, October 18, 2026 (Stallion Power sales page). Check your medicines with your doctor first.
FAQ05
Questions about green tea extract
Does green tea extract cause stomach upset?
It can, especially on an empty stomach, and the U.S. Pharmacopeia advises taking green tea extract with food (USP 2020, green tea extract liver review). The Stallion Power label gives no with-food instruction, so ask a clinician if you are unsure.
Does green tea extract contain caffeine?
Yes. The National Center for Complementary and Integrative Health notes that green tea extract carries caffeine (NCCIH, Green Tea). Stallion Power also prints a separate 5 mg of added caffeine in its blend.
Who should avoid green tea extract?
People with liver problems, and people who take nadolol, should ask a clinician before using it (NCCIH, Green Tea). The same goes for anyone pregnant, nursing or on medicine.
Who wrote this06
Written and reviewed by
Pages built from the label, the sales page and linked NIH, FDA, CDC, FTC and peer-reviewed sources.
Last updated . Read our editorial standards and how we check reviews. This website is run by Stallionpowermen, a USA stocking retailer for Stallion Power, not by the manufacturer or the distributor. We are paid a commission when you buy through our order links.
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