A compound in green tea called EGCG is way better than other similar compounds at blocking an enzyme in the body that modifies estrogen, making it hundreds of times more effective at doing this job.

Evidence from Studies

Supporting (1)

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Molecular modelling study of the mechanism of high-potency inhibition of human catechol-O-methyltransferase by (–)-epigallocatechin-3-O-gallate

Computational/Algorithm Study

2008 Feb

The study found that EGCG, a compound in green tea, blocks a specific human enzyme much more strongly than similar compounds — exactly as the claim says.

Contradicting (0)

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No contradicting evidence found

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Source Study

Molecular modelling study of the mechanism of high-potency inhibition of human catechol-O-methyltransferase by (–)-epigallocatechin-3-O-gallate

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DOI: 10.1080/00498250701744641

Similar Assertions

The green tea compound EGCG slows down a body enzyme that normally breaks down adrenaline, so your adrenaline sticks around longer and might keep you feeling more alert.

25

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79%

When you drink green tea, your liver uses a special enzyme called COMT to change two of its key compounds—EGCG and EGC—into slightly different forms, and scientists have seen this happen in test tubes using liver fluid from humans, mice, and rats.

20

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78%

A compound in green tea called EGCG slows down a human enzyme that modifies estrogen, but it doesn’t block the enzyme’s main working spot—it sticks somewhere else to mess with how it works.

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72%