ABOUT
Red Jade GABA (wulong) is a Taiwanese tea produced in Taiwan, made from the Hong Yu cultivar, also known as TTES #18 or Red Jade. This cultivar is valued for its naturally expressive aromatic profile, combining depth with a characteristic spicy and slightly minty nuance. It provides a strong foundation for both oxidation and specialized processing techniques.
The production follows a wulong-style approach, including withering, partial oxidation, and drying, combined with a controlled anaerobic processing stage. During this stage, the leaves are placed in oxygen-free conditions, which promotes the conversion of glutamic acid into gamma-aminobutyric acid (GABA). This process alters both the chemical composition and the sensory profile of the tea, creating a more rounded and mellow expression.
Red Jade GABA occupies a distinctive position within Taiwanese tea production as a combination of cultivar identity and functional processing. It is valued for its smooth texture, balanced structure, and integrated aromatic profile. The tea reflects both the character of the Hong Yu cultivar and the refinement achieved through controlled GABA processing.
TERROIR
Red Jade GABA (wulong) is cultivated in central Taiwan, particularly in regions such as Nantou County, where the Hong Yu (TTES #18) cultivar is widely grown. The area lies at low to mid elevations and is characterized by a humid subtropical climate with abundant rainfall, warm temperatures, and frequent cloud cover. These conditions support steady plant growth and allow the leaves to develop both aromatic intensity and structural balance.
The terrain consists of gently rolling hills with well-drained soils rich in organic matter and minerals. These soils provide a stable nutrient base, supporting the development of the Hong Yu cultivar without excessive vigor. The result is a dense and resilient leaf material, well suited for both oxidation and the subsequent GABA processing. Microclimate plays a defining role, with diffused sunlight, stable humidity, and consistent air circulation regulating plant metabolism. Compared to higher mountain regions, the leaves develop more quickly, contributing to a fuller body and more pronounced structure. The balance between amino acids and polyphenols supports both sweetness and depth in the final tea.
Another important aspect is the interaction between terroir and processing. The composition of leaves grown in these regions allows them to respond effectively to anaerobic treatment, facilitating the development of GABA while maintaining aromatic clarity. This integration ensures that the final tea expresses both the regional character of Taiwan and the unique qualities introduced through specialized processing.
ORGANOLEPTICS
The dry leaf is semi-rolled with a slightly twisted structure, showing dark brown to reddish tones, reflecting both oxidation and GABA processing. The aroma of the dry leaves is warm and expressive, with notes of ripe fruit, honey, light spice, and a subtle herbal nuance characteristic of the Hong Yu cultivar. In a preheated teapot, the leaves begin to open from the first infusion, releasing a rich aromatic profile where fruity sweetness is supported by gentle spicy and slightly minty undertones. As the infusion develops, the aroma becomes more integrated, combining dried fruit notes with a smooth, rounded depth.
The aroma of the liquor is full and harmonious, with a balanced combination of fruit, honey, and light spice. The taste is smooth and mellow, with a medium body and a soft, slightly viscous texture. A pronounced natural sweetness forms the core of the profile, supported by notes of ripe fruit, light herbal tones, and a mild, well-integrated astringency that adds structure. The GABA processing is reflected in the rounded and calming character of the tea. The aftertaste is long and gentle, with a returning sweetness and a soft, slightly cooling finish. In the empty cup after drinking, a delicate fruity and lightly sweet aroma remains, leaving a calm and refined final impression.