Herb
Green tea
SaveA catechin-rich tea that combines L-theanine, caffeine, and polyphenols for focus, metabolic support, and long-term cardiometabolic benefit.
Quick verdict
One of the most useful plant beverages for daily health, with real support for alertness, weight management, and long-term risk reduction.
Evidence score
A rough internal score reflecting quantity, quality, and consistency of human evidence. Not a clinical recommendation.
What the research shows
Green tea and EGCG-rich extracts have support for cardiometabolic markers, thermogenesis, and alert calm from the caffeine plus L-theanine combination. Beverage use has a better safety track record than aggressive extracts.
Benefits
- Supports alertness and focus
- Provides catechins linked to cardiometabolic benefits
- May modestly increase fat oxidation
Dosage notes
Common intake is 1-4 cups/day of tea or moderate-dose extracts; avoid very high-EGCG products on an empty stomach.
Side effects
- Insomnia
- Anxiety
- Liver concerns with aggressive extracts
Who should be cautious
High-EGCG extracts can stress the liver, and caffeine-sensitive users may experience anxiety, insomnia, or palpitations.
What this page cannot tell you
Tea drinking is generally safer than concentrated extract use, and weight-loss effects are modest rather than dramatic.
Leaderboard scores
- Focus45
- Longevity45
- Energy40
- Weight loss35
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