Green Tea

Green tea is a daily-use drink that appears often in anti-inflammatory food lists because it is simple, repeatable, and tied to polyphenol-rich tea habits rather than dramatic beverage claims.

Quick answer

Green tea contains EGCG (epigallocatechin gallate), one of the most studied catechin polyphenols in nutrition research. It also provides L-theanine, an amino acid associated with calm focus, along with modest caffeine and a range of other catechins.

What it is

Green tea is made from the leaves of Camellia sinensis that are quickly heated after harvesting to prevent oxidation, preserving their green color and catechin content. It originated in China over 4,000 years ago and remains central to tea culture across East Asia.

Green tea is available as loose leaf, bagged, powdered, and bottled. It is consumed hot or iced and used in cooking in some traditions. Japanese sencha, Chinese longjing (dragonwell), and gunpowder tea are among the most recognized varieties.

Why green tea may support an anti-inflammatory diet

EGCG is the most abundant catechin in green tea and has been studied for its ability to modulate several inflammatory signaling pathways, including NF-kB and MAPK. These pathways are involved in the production of pro-inflammatory cytokines, and EGCG appears to help regulate their activity in cell and animal studies.

Green tea also provides L-theanine, which may support stress reduction — relevant because chronic psychological stress is associated with elevated inflammatory markers. The combination of moderate caffeine with L-theanine creates a profile that supports alertness without the jitteriness of coffee.

Key nutrients and compounds

A typical 240ml cup of brewed green tea provides approximately 25-50mg caffeine, 20-35mg L-theanine, and 50-100mg total catechins (of which EGCG may account for 25-50mg). It contains trace amounts of manganese, potassium, and B vitamins. Green tea is essentially calorie-free when consumed without sweeteners.

Potential health benefits

Provides EGCG catechins studied for antioxidant and anti-inflammatory properties
Offers L-theanine for calm, focused alertness without excessive stimulation
Serves as a zero-calorie replacement for sugary beverages
Contains fluoride and catechins that may support oral health
Fits easily into daily routines as a morning or afternoon habit

How to eat green tea

Brew loose-leaf green tea at 70-80C (160-175F) for 2-3 minutes to avoid bitterness
Keep a pitcher of cold-brewed green tea in the fridge for a refreshing daily drink
Replace afternoon coffee with green tea for a gentler caffeine source
Add a splash of lemon juice, which may help preserve catechin stability
Use brewed green tea as the liquid base for smoothies or overnight oats
Try different varieties: sencha for grassy flavor, genmaicha for toasted rice notes

Shopping and storage

Choose loose-leaf or high-quality bagged green tea from reputable sources. Store in an airtight container away from light and moisture. Green tea is best consumed within 6-12 months of purchase for optimal catechin content and flavor.

FAQ

How many cups of green tea should I drink per day?

Most research uses 3-5 cups per day, providing roughly 200-300mg of catechins. Individual caffeine tolerance should guide your upper limit.

Is green tea better than black tea for inflammation?

Green tea has higher catechin content because it is less oxidized. Black tea contains different polyphenols called theaflavins. Both have potential benefits, but green tea has more research specifically on catechins and inflammatory markers.

Does adding milk reduce green tea benefits?

Some research suggests milk proteins may bind to catechins and reduce bioavailability. Drinking green tea plain or with lemon may preserve more catechin content.

Is decaf green tea still beneficial?

Decaffeination reduces but does not eliminate catechin content. Decaf green tea still provides some EGCG and other polyphenols, though at lower levels than regular.

Evidence note

Green tea catechins, particularly EGCG, have been studied in numerous cell, animal, and human trials. Systematic reviews suggest modest associations between regular green tea consumption and lower levels of certain inflammatory markers, though effect sizes vary across populations and study designs.

This page describes green tea as a supportive food within a broader anti-inflammatory eating pattern, not as a standalone medical treatment. Readers with specific health concerns should consult qualified healthcare professionals.