Analysis Version
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causal
Strong Support

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

61
Pro
1
Against

Evidence from Studies

Supporting (3)

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Community contributions welcome

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The Impact of Decaffeinated Green Tea Extract on Fat Oxidation, Body Composition and Cardio-Metabolic Health in Overweight, Recreationally Active Individuals

Randomized Controlled Trial
Human
2021 Feb 26

This study gave people green tea extract without any caffeine and found they burned more fat during exercise, proving that green tea can help burn fat even when caffeine is removed.

60

The effect of a decaffeinated green tea extract formula on fat oxidation, body composition and exercise performance

Randomized Controlled Trial
Human
2015

This study gave people green tea extract with the caffeine removed, and their bodies still burned more fat — proving it’s not the caffeine doing the work.

49

Efficacy of a green tea extract rich in catechin polyphenols and caffeine in increasing 24-h energy expenditure and fat oxidation in humans.

Randomized Controlled Trial
Human
1999 Dec

The study gave people green tea extract, just caffeine, or nothing. Only the green tea extract made the body burn more fat all day—even though the caffeine amount was the same in two groups. So, something else in green tea (not caffeine) is responsible.

Contradicting (1)

1

Community contributions welcome

1

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 green tea extract, which has caffeine and other chemicals, but didn’t remove the caffeine to see if the fat-burning effect happens without it — so we can’t say for sure if it’s the caffeine or something else doing the work.

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.

Similar Assertions

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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1
87%

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.

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0
87%

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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87%

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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83%

Taking a specific green tea extract every day for four weeks helps your body burn more fat while you exercise—without making you burn more total calories—so your body uses fat as fuel more efficiently.

60
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82%

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