Green Tea Extract and Liver Safety: A Rare but Real Risk

Yes, in some people, though it is uncommon. NCCIH reports liver injury in people who used green tea products, primarily extracts in tablet or capsule form (NCCIH, Green Tea).

The NIH Office of Dietary Supplements also links green tea catechin extracts to liver injury (NIH ODS, Dietary Supplements for Weight Loss). Neither source gives a rate we can quote, so we will not invent one.

This is why the form matters. People who drink tea have a long record of use, while concentrated extracts are a newer product with a different risk profile. Reading a label for the word extract is a useful first check.

The cause is not settled. Reports tend to involve concentrated catechins, often taken in large daily amounts.

Common signs include yellowing of the skin or eyes, dark urine, pale stools, severe stomach pain, nausea and unusual tiredness.

Liver problems from supplements can start quietly. Some people notice nothing until a blood test shows a change, so tell your doctor about extracts you take before any test.

If you notice any of these, stop the product and call your doctor promptly. For sudden severe pain or confusion, seek urgent care.

• Tell your doctor every supplement you take, with the bottle in hand.
• Report new symptoms even if they seem mild.
• Do not combine several concentrated plant extracts without advice.

Probably a small one for most adults, given the low ceiling, but nobody can promise that.

The amount is unprinted and no trial tested the drops. That means the safety picture comes from the ingredient in general, not from this bottle. People with liver disease, or who take other liver-stressing products, should ask a physician first. The label asks the same of anyone on other medication.

For the full picture of cautions, read the Sugar Defender side effects page.