If you drink less than about three cups of coffee a day, green tea extract might help you burn fat better—but if you’re already a big caffeine drinker, it might not help as much.

Evidence from Studies

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No supporting evidence found

Contradicting (1)

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The effect of green tea extract on fat oxidation at rest and during exercise: evidence of efficacy and proposed mechanisms.

Narrative Review

2013 Mar 1

The study looked at whether green tea extract helps burn fat, but it didn’t check if people who drink a lot of coffee or tea respond differently than those who don’t. So we can’t tell if the claim about caffeine intake matters.

Gold Standard Evidence Needed

According to GRADE and EBM methodology, here is what ideal scientific evidence would look like to definitively prove or disprove this specific claim, ordered from strongest to weakest evidence.

Source Study

The effect of green tea extract on fat oxidation at rest and during exercise: evidence of efficacy and proposed mechanisms.

Score: 1

DOI: 10.3945/an.112.003269

Similar Assertions

Drinking green tea extract can help your body burn more fat over a full day—even if you remove the caffeine from it.

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Drinking green tea extract might help some people burn more fat while sitting around, with studies showing about a 16% boost on average—but it doesn’t work the same for everyone because the tea’s ingredients and your body type can change the results.

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Drinking green tea might help you burn more calories and fat, but it’s not because of the caffeine—it’s something else in the tea, since just taking the same amount of caffeine by itself doesn’t do anything noticeable.

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Drinking green tea extract for a long time might help animals burn fat better by turning on certain genes in their liver and muscles, but we don’t know yet if this happens in people too.

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If you drink green tea extract every day for at least three months and also do regular cardio like running or cycling, your body might burn more fat during your workouts—up to a quarter more than if you didn’t take the extract.

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81%