Green Tea Extract
What the European Food Safety Authority and the United States National Institutes of Health have published about green tea extract intake, and what the catalogue records. Reference figures and citations only.
Stacky is an organisational tool, not a medical device. It does not provide medical advice, and nothing on this page says what green tea extract does. Talk to a doctor or pharmacist before starting, stopping or changing what you take.
Published intake references
Each figure is one authority’s published value, with the kind of figure and the people it applies to as that authority stated them. Where the EU and the US differ, both are shown and neither is averaged or converted. Only a tolerable upper intake level sets a ceiling. A recommended or adequate intake is context, not a limit.
European Union — EFSA
United States — NIH ODS / IOM
“None established” means that authority examined green tea extract and set no figure. A substance for which Stacky holds no published reference has no row here, and no page.
Products in Stacky’s catalogue containing Green Tea Extract
1 product whose label declares green tea extract, listed by brand and drawn as the app draws them. Amounts are the manufacturer’s printed figures; Stacky has measured nothing and ranks nothing.
How it is recorded
What the app records so it can schedule a dose. None of it is advice.
Times of day suggested in the app: Morning.
Food: the app records green tea extract as taken with food.
Recorded interactions
What a named source says about green tea extract taken alongside another substance: absorption and nutrient status only. Each row links to its source. A row without one is not published, and neither is one whose source description names a disease or clinical condition. None of these says whether a combination is good or bad.
| Relationship | What the source says | Source |
|---|---|---|
| Reduces absorption or status of Iron | Flavonoids from tea bind non-heme iron and inhibit its intestinal absorption, and can also inhibit heme iron absorption. Vitamin C greatly enhances iron absorption and can counteract this effect of flavonoids. Scope the source gave: tea flavonoids consumed with a meal or with iron; one cup of tea with a meal decreased non-heme iron absorption from that meal by about 70%. |
Linus Pauling Institute Checked 6 Aug 2026 |
Indexed studies
Stacky has 5 papers indexed against green tea extract, and none of them is published here. A study reaches this page only if its own title names Green Tea Extract and does not name a disease or clinical condition. None of the 5 passes that rule. They remain in the app. How this list is built →
About this page
Stacky is a supplement tracking app. It renders what you take and what published sources say about it; it does not tell you what to take. Every figure on this page names the authority that published it and links to that authority’s own page.
Not on this page: a dose of our own, a grade, a verdict on whether green tea extract works, or any statement that it treats, prevents or improves a condition. How these pages are built →
Figures are read from the authorities’ published tables and can go out of date when those tables are revised. If one here is wrong, tell us at support@stacky-app.com and we will check it against the source.