What do the states mean?+
- Solid: well studied, and it works.
- Half-there: the science is still forming.
- A ghost: almost no real studies.
- Hollow: well studied, and it does not work.
- A cord: the pair itself has been tested together.
- Air: nobody has ever tested this pair.
The full scoring method: How we score
Green tea extract benefits: where the science stands
For weight and body fat: not settled yet.
Weight and body fat are what most people take green tea extract for, and the strongest evidence says it helps (a combined review covering 10 trials). As of August 2026, the verdicts on this page rest on evidence from 51 trials, drawn from the strongest research among the 665 papers on PubMed that mention green tea extract. Every claim is checked below.
665 papers on PubMed · evidence from 51 trials
Claim by claim
- Weight and body fatThe science is still forming. Results lean positive, but there is not much yet.
- Cancer preventionWell studied, and it does not work. The biggest review covered 11 trials.
- CholesterolAlmost no real studies. What exists leans positive.
- InflammationThe science is still forming. No real difference found so far.
See 1 more scored claim+
- Memory and focusThe science is still forming. Results lean positive, but there is not much yet.
Pairs people ask about
The five sources we read
- 2017Meta-analysis · pools 21 trials · small benefit for memory and focussource
- 2020Meta-analysis · pools 11 trials, 1,795 people · no clear effect on cancer preventionsource
- 2020Meta-analysis · pools 7 trials · small benefit for cholesterolsource
- 2024Meta-analysis · pools 10 trials · small benefit for weight and body fatsource
- 2026Randomized trial · 97 people · no clear effect on inflammationsource
Chosen as the strongest evidence out of 665 papers on PubMed. Every row links to its paper.
Fair questions
Does green tea extract work?+
For weight and body fat, it is not settled. Results lean positive, but there is not much yet.
Is green tea extract safe?+
No caution is recorded on this page. That is not a safety guarantee; the studies we read were not safety trials.
Why only 5 sources, when PubMed lists 665?+
The 665 is every paper that mentions green tea extract in any way: animal studies, blood measurements, papers where it is a side note. The strongest sources are combined reviews, and each one already gathers every trial its authors could find. Our 5 cover 51 trials between them, and every one is linked above. Both counts are measured, not estimated.