Green Tea Extract and Metabolism: Benefits and Cautions

Ingredients · Published October 15, 2026 · 4 min read

Green tea is one of the world’s most researched beverages, and its extract is a common ingredient in metabolic formulas, including BurnForce.

What is in it?

Green tea contains polyphenols called catechins, the best known being EGCG, along with a modest amount of caffeine. A brewed cup typically contains roughly 25 to 50 mg of caffeine, while extracts vary widely.

What does the research say?

Reviews of trials on green tea and weight have generally found small effects at best, and results differ between studies. The National Center for Complementary and Integrative Health notes that green tea as a drink is likely safe for most people, while research on concentrated extracts is less settled.

Cautions

• Caffeine sensitivity: can cause jitters, sleep trouble or a faster heartbeat
• Liver: rare cases of liver injury have been reported with high-dose extracts, so avoid exceeding label directions
• Medications: may interact with some medicines, including certain blood thinners and stimulants
• Iron: tea can reduce absorption of iron from plant foods

How to use it sensibly

Take extracts as directed, avoid combining many caffeine sources, and keep an eye on sleep, since weight and energy goals depend heavily on rest. If you are sensitive to caffeine, ask a doctor or pharmacist first.

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This article is for general education and is not medical advice. See our disclaimer. This page contains affiliate links.