GABA oolong vs Dong Ding: choosing by flavour

GABA oolong takes its name from a processing method that increases the GABA content of the leaves. Here we compare it with Dong Ding made without that treatment. Both are oolongs, though their flavours and processing can differ.

Dry GABA tea leaves.
Photo: Pannet · CC BY 4.0

Dry leaves of Taiwanese Dong Ding oolong.
Photo: Waliy sherpa · CC BY-SA 4.0

Aspect	GABA oolong	Dong Ding
Processing	Leaves are held with very little oxygen, allowing their own enzymes to convert some glutamate into GABA. Producers may alternate this with exposure to air.	Partially oxidised leaves are usually rolled into balls. Oxidation and roasting vary, and roasting may use charcoal or other heat sources.
Possible flavours	May have notes of baked fruit, bread or flowers, sometimes with a little tartness. The balance varies between teas.	Roasted versions often have nutty, caramel or baked notes; lightly roasted ones may have more floral notes. Check the roast level.
Caffeine and GABA	Contains caffeine. More GABA in the dry leaves does not make the tea a proven treatment for anxiety or insomnia. Figures in milligrams per 100 g describe dry tea, not the amount in a cup.	Contains caffeine. How it makes you feel depends on your sensitivity, when you drink it and how much you have.
Starting brew	Try 4–5 g per 100–120 ml, 90–95 °C and 10–20 seconds, then adjust. GABA oolong can also become bitter.	Try 4–5 g per 100–120 ml, around 95 °C and 15–20 seconds. Leave room for the leaves to open; the infusion count is not fixed.
Questions for the seller	Cultivar, origin, season and roast. For a GABA-content claim, ask for a batch-specific test and its units.	Production location, cultivar, season and roast. The name Dong Ding alone tells you little about a particular cup.

Which to choose

Try a small GABA oolong sample if you enjoy bready, fruity and slightly tart notes. For a nutty roasted flavour, try Dong Ding with a stated roast level. Do not automatically assign one to daytime and the other to evening: both can affect sleep.

Tea comparisons