Green Tea Extract (GTE) is a concentrated form of the compounds found in green tea leaves, primarily catechins. The most abundant and well-studied catechin in GTE is epigallocatechin gallate (EGCG). Green tea, derived from the plant *Camellia sinensis*, has been consumed for centuries as a beverage and used in traditional medicine. GTE aims to deliver these beneficial compounds in a more potent form than drinking green tea itself. (NIH National Center for Complementary and Integrative Health).
Catechins like EGCG are a type of polyphenol, which are plant-based compounds known for their antioxidant properties. Beyond EGCG, GTE also contains other catechins such as epicatechin gallate, epicatechin, and epigallocatechin, as well as caffeine and other flavonoids. The specific composition and concentration of these compounds can vary widely between different green tea extract products. (PubChem).
Interest in GTE has grown significantly due to its potential roles in supporting metabolic health, cardiovascular function, and cellular protection. However, it's important to differentiate between the effects of drinking green tea and taking a concentrated extract, as the latter can deliver much higher doses of its active components. (Examine.com).
Deep dive
Tap a section to expand.
Known interactions
Category rule: glp1 × supplement
Note
GLP-1 medications slow stomach emptying, changing how/when oral supplements absorb; rapid weight loss raises the importance of protein and micronutrients.
Time oral supplements when nausea is lowest; prioritize protein and micronutrients; discuss with your provider.
Category rule: supplement × medication
Note
Some supplements change how the body processes medications (absorption, liver enzymes, or additive effects).
Specific pairs are checked against a licensed drug database and shown with their own severity. Always confirm with your provider or pharmacist.
Sources referenced
- Cochrane Library
- DrugBank
- Examine.com
- FDA (U.S. Food and Drug Administration) label warnings
- Mayo Clinic
- MedlinePlus
- NIH National Cancer Institute
- NIH National Center for Complementary and Integrative Health (NCCIH)
- NIH Office of Dietary Supplements (ODS)
- PubChem
Stackwise compiles summaries from publicly available scientific and regulatory references. Always verify important decisions with a licensed clinician.
Related compounds
Others in the supplement category or studied for the same goals.
