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Green tea extract in Australia: liver safety and evidence
TL;DR
Liver injury has been reported in some people taking green tea extracts in tablet or capsule form (NIH NCCIH). High doses of green tea can also lower levels of the heart and blood-pressure medicine nadolol. Ask your GP or pharmacist first, especially if you have a liver condition or take medicines.
What the research says
NIH ODS (weight loss fact sheet) reports a possible modest effect on body weight for green tea catechins, no safety concerns for green tea as a drink, and some safety concerns for green tea extract, including reports of liver damage. [1]
Safety notes
Liver injury has been reported in some people taking green tea extracts in tablet or capsule form (NIH NCCIH). High doses of green tea can also lower levels of the heart and blood-pressure medicine nadolol. Ask your GP or pharmacist first, especially if you have a liver condition or take medicines. [2]
Prices in Australia
Price check pending. We couldn't verify relevant current Australian retailer prices, so none are shown.
FAQ
Is drinking green tea the same as taking an extract?
No. NIH notes the liver concerns relate mainly to extracts in tablet or capsule form.
Sources
- Dietary Supplements for Weight Loss – Fact Sheet for Health Professionals (NIH ODS)
- Green Tea (NIH NCCIH)
Sources checked 15 Oct 2026. Pending human review before publication.