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What is GABA tea?
GABA tea is tea fermented in an oxygen-free chamber, where the leaf's natural glutamine converts into gamma-aminobutyric acid (GABA) — one of the brain's main calming neurotransmitters. The technology was discovered in 1987 by a team of Japanese scientists at the National Institute of Vegetables and Tea Science led by Dr. Tsushida, then perfected in Taiwan, today the home of the style. Conventional oxidation in open air leaves GABA content low; anaerobic fermentation raises it to 150–300 mg per 100 g of finished tea.
How is GABA tea made?
The leaf — typically the same fine material used for Jin Xuan and Siji Chun oolongs — is processed like a regular oolong, then placed in an anaerobic "altitude chamber" where oxygen is replaced by nitrogen. Each session lasts from 30 minutes up to 10 hours, and the leaf passes through the chamber at least three times until the target GABA level is reached. High-mountain versions use summer-harvest leaves, naturally rich in amino acids — production is limited, and both quality and price sit above valley teas.
What does GABA tea taste like?
Anaerobic fermentation leaves a signature no other process gives: ripe and dried fruit, berry compote, a light wine-like tang and a remarkably thick, sweet, mellow body. It is a flavor family of its own — distinct from any classic oolong, red tea or puer, and it surprises even seasoned tea drinkers.
Is GABA tea relaxing?
GABA is one of the key inhibitory neuromediators, carrying nerve impulses between brain cells, and in this tea it forms naturally during processing — no additives, pure technique. Drinkers consistently describe GABA teas as smooth and calming, taking the edge off the day without dulling the mind. Keep in mind that GABA tea still contains caffeine, like any true tea — think of it as a mellow companion for the afternoon or early evening, not a sleep aid.
GABA oolong, GABA red or GABA puer?
Since the early 2000s the technology has spread from Taiwan to mainland China, where it is applied to red and green teas as well. In 2019 the first batch of GABA shu puer was produced in Dali county, Yunnan — by special order of Moychay, with specialists from Kunming University, from 2018-harvest material.
| Type | Base & origin | Taste | Character | Start here if… |
|---|---|---|---|---|
| GABA oolong | Jin Xuan / Siji Chun leaf, Taiwan | Ripe fruit, berry compote, wine-like tang | The reference: smoothest and most fruit-forward | You are new to GABA tea |
| GABA red | Red (black) tea, Taiwan and mainland China | Honey, malt, dried fruit | Warmer and cozier, an easy evening cup | You love black teas |
| GABA puer | Shu puer, Yunnan | Earthy depth, dark dried fruit | The densest and most grounding of the three | You already drink puer |
How to brew GABA tea
Treat it like a good oolong: a gaiwan or small teapot, water at 90–95°C and several short infusions that unfold the fruit and compote notes one by one. Western style also works — one teaspoon per cup, 3–4 minutes.
Moychay has championed GABA tea for years, buying directly from producers in Taiwan and Yunnan, and keeps one of the widest GABA selections in Europe. Orders ship from our Amsterdam warehouse across the Netherlands and Europe, and you can always taste before you buy at the Moychay tea club — Rozengracht 92H, Amsterdam.
Facts and figures in this guide are based on “Geography of Chinese Tea” by Sergey Shevelev, founder of Moychay — written after visiting every tea-producing province of China.
