Comparison guide
Which tea supplement should you take?
All six come from the same plant, Camellia sinensis, processed differently, and the supplement evidence for each is limited. The difference that matters most is safety: concentrated green tea extracts are behind the rare liver-injury reports, while brewed tea carries no comparable signal.
The options, compared
| Option | Evidence | Best for | The honest note | |
|---|---|---|---|---|
| Green Tea Extract (EGCG) | Limited evidence | Not worth the liver risk | The Cochrane review found essentially no weight loss (a pooled 0.04 kg), and EGCG at 800 mg/day or more is associated with raised liver enzymes and rare acute hepatitis. If you take it anyway, take it with food. | View |
| Matcha Green Tea | Limited evidence | The default, as a drink | Whole powdered leaf that reliably delivers caffeine and L-theanine, though trials on cognition and mood are small and mixed. Choose tested sources, because swallowing the leaf means more lead than brewed tea. | View |
| White Tea Extract | Limited evidence | Little reason to choose it | Sold as the most antioxidant-rich tea, but the one controlled trial found no change in oxidative stress markers, and there is no studied dose for extracts. | View |
| Oolong Tea Extract | Limited evidence | Not shown to cause weight loss | Raises fat oxidation slightly in small metabolic studies, but no adequately sized trial shows meaningful weight or fat loss from the extract. | View |
| Pu-erh Tea Extract | Limited evidence | Too little human data | One small trial found a slight drop in weight and BMI over 12 weeks; most other support comes from animals. Buy from reputable suppliers, as poorly stored fermented tea can carry mycotoxins. | View |
| Black Tea Theaflavins | Limited evidence | Low-EGCG option, thin evidence | The best-known cholesterol trial used a mixed extract that also contained green tea catechins, so the effect of theaflavins alone is unproven. Isolated theaflavins have not been linked to liver injury, but many black tea extracts also contain catechins, so read the full label. | View |
Our verdict
Drink green tea or matcha if you want the catechins; it is the sensible default and avoids the liver concerns of concentrated extracts. Skip high-dose EGCG extracts, especially as fat burners, and treat white, oolong, pu-erh and black tea extracts as thinly supported variations on the same leaf. All of them reduce non-heme iron absorption, so keep them away from iron-rich meals if your iron is low.