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Category: Blue Tea (Oolong Tea)

Origin: TAIWAN, Alishan District.

Cultivar: Qing Xin (Green Heart)

Quantity: 50g per pack

Other: GABA Process, deep roast



GABA is an acronym for Gamma-AminoButyric Acid. It is a naturally occurring amino acid that works as a neurotransmitter in the brain, with potential regulatory effects on anxiety, stress and fear. GABA also occurs naturally in Camellia sinensis, albeit at small dosis.


GABA Tea is a tea that has undergone a special oxygen-free fermentation process, resulting in higher concentrations of GABA in the leaves, on average 10 to 30 times higher than in green tea, with a more potent relaxing effect.


This technology was discovered in Japan by Dr. Tsushida Tojiro and his collaborators  who began developing GABA-rich tea in 1984 and successfully produced a new type of tea in which almost all glutamic acid was converted to GABA without changing the content of catechin or caffeine.


GABA was initially used in Japanese green teas. It was then tried in Taiwan on several Oolong teas and the result was very surprising.

The GABA Oolong tea from Alishan is darker in colour, soft, smells like ripe dry fruits (reminds me of raisins) and is perfect for an evening treat.


It is unique in its genre and rare to find. This is why we are very proud to make it available in our Taiwan tea collection at MANDARACHA.



4g (0.14oz) of leaves per serving

100ml of water at 95-98°C (203-208°F) per serving

First brew: 60 seconds

Subsequent brews: 60-90 seconds