Formosa Large Leaf GABA Oolong

US$ 6.50US$ 25.00

Many clinical studies have shown that the ingestion of GABA releases human growth hormones with remarkable effectiveness, especially after exercise. The release of growth hormones is known to increase lean body mass.

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Tasting Note: Sweet potato peel, Nectar, Nutty

Ferment Level: 50%, Medium

Roasting Level: Light

GABA Content: 207mg/100g tea

Growing Location and Altitude: 1850 Meter, Yunnan Border, China

Manufacturing Location: Taiwan

GABA Tea is one of the most precious teas that was ever developed, not only for its resulting drinking enjoyment, but rather for its reputed health benefits. Recently introduced in the 1990’s and was developed by Dr. Tsushima Tojiro of Japan’s National Tea Experiment Station. His work resulted in a procedure that increases the content of γ-Aminobutyric acid, or gamma-Aminobutyric acid, or even simpler, GABA, the acronym of the term. GABA plays a role in regulating neuronal excitability throughout the nervous system.

Because of its calming and soothing effects, GABA helps to lower blood pressure, helps to control hypoglycaemia, prevents anxiety and promotes restful sleep. To an extent, it also regulates appetite, which is helpful in maintaining an optimal body weight. In addition, GABA is also directly responsible for the regulation of muscle tone.

Many clinical studies have shown that the ingestion of GABA releases human growth hormones with remarkable effectiveness, especially after exercise. The release of growth hormones is known to increase lean body mass. Consequently, GABA tea is an invaluable nutritional supplement for body builders, power lifters, runners, martial artists, and athletes of all types All teas have health-promoting compounds, but GABA tea has the highest concentration of anti-oxidants, including catechins, flavanoids, and polyphenols. Anti-oxidants are helpful in fighting many types of disease including: cancer, Parkinson’s disease, senility, drug-induced deafness, schizophrenia, and Alzheimer’s disease.

With all this said, the best thing about GABA tea is that it is wonderfully good in the cup! This tea is one of the most accessible, easy drinking teas we propose. The special, oxygen-deprived environment that increases the content of GABA while oxidizing the leaves, smoothes out the tannins leaving a crisp, slightly tart, but never bitter feeling in the mouth. The nose is all fruit, berries to be more precise. As soon as hot water is poured on the leaves, a wonderfully inviting aroma of strawberry jam and sultana raisins invites us to taste the cup. Generous and refreshing, GABA tea not only makes a beautiful hot beverage, it is fantastic as a refreshing iced tea!

Additional information

Weight N/A

25g, 100g


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   For many curious tea connoisseurs, there may be some valuable questions regarding their introduction to GABA tea. Things like, “what kinds of GABA tea are out there?” or “how can I brew my GABA tea?” and the most tantamount to many new drinkers, “what is GABA tea?”. All of these are important and interesting questions! So let jus begin with our tutorial on this excellent variety of tea!

1. What is GABA tea?

              GABA is actually an acronym. it stands for “gamma-aminobutyric acid”. This amino acid occurs naturally in our brains and eases the flow and communication of neurons. It also happens to occur naturally in tea plants, too. It was in the ’80s that the Japanese researcher, one dr. Tsuchida Tojiro found that tea’s GABA levels could be enhanced via special processing methods. The result was in tea that provided its drinkers with increased levels of calm and some of the other health benefits of standard tea. It also resulted in drinkers experiencing decreased levels of anxiety and depression with more restful sleep, too. Today the majority of GABA tea is produced in Japan and Taiwan.

2. What kind of GABA is on the market?

            Because GABA is a processing method rather than a particular type of leaf, virtually any kind of tea can undergo the same processes to become GABA tea. The most common GABA on the market is Taiwanese GABA Oolong. Other varieties include GABA green, black and yellow tea. Interestingly, there is tea labeled GABA pu’erh on the market as well. However, we prefer to refer to this as GABA post-fermented or GABA dark tea. This is because only tea produced in Yunnan province can be called true “pu’erh” while lots of the GABA “pu’erh” on the market is actually produced in Taiwan!

3. Should I brew my GABA in a special way?

                 Brew your GABA the same as you would any other tea! For GABA green, brew it as you would normally brew green tea! Though we suggest using a keen side-handled kyusu pot if you have one! We also suggest trying your GABA tea iced or cold brewed to unlock some nuanced flavors, aromas, and textures!

4. How does GABA tea taste? 

                GABA undergoes an enhanced processing method, one in which the tea leaves are placed in stainless steel vacuum drums and have the oxygen replaced with nitrogen. This affects the flavor and aroma, but one that differs from tea type to tea type and is at times a bit more subtle. A tea that will generally have a vegetal taste with floral notes may evolve into a savory, sweet or even malty flavor palette as a result of GABA processing. Other tea drinkers have described GABA teas as having a flavor profile and body similar to many black teas.

5. What are the health benefits of GABA tea?

               Aside from amplified levels of tranquility, better sleep and reduced anxiety and depression, GABA’s health benefits are manifold. GABA provides the same health benefits as standard tea such as L-theanine to help offset some of its caffeine content. Antioxidants and tannins that can promote proper health and even potentially guard against developing certain types of ailments like cancer. It also helps circulation and blood flow and can even help us to lose weight and stay fit and healthy!

6. Are there side effects?

                GABA tea is still tea. And so any of the potential negatives of standard tea is still present with GABA. While GABA does offer enhanced calming effects and the like, it still possesses caffeine and is not advised as a before-bed beverage. Caffeine being a diuretic will also result in more bathroom trips and the need to readily hydrate with some water!

7. How is GABA tea graded?

                An excellent question! GABA’s level of quality comes in a two-fold way. First, the same standard grade of quality that is applied to all tea leaves is also applied to GABA tea. This includes grading things like the leaf quality, type, aroma, taste, terroir and time of harvesting for the tea leaves. These are all step 1 of GABA’s quality standard check. The next step involves grading how much GABA is found in the final processed tea. Once the standard leaves undergo their transformation into GABA tea they are subjected to this next grading step. In order for the tea to meet the Japanese tea standards and be labeled as GABA, it must contain 150 milligrams of GABA for every 100 grams of dry tea leaves. This is the bare minimum with the potential for some tea to contain a bit more GABA per gram. But the standards are quite stringent and if you seek out GABA from Japan or Taiwan, you will be getting high-quality GABA tea!

The wonderful world of GABA

                The world of GABA tea is wide and vibrant. Come and explore more of this superb quality processed tea yourself today. From GABA black to green to yellow to Oolong to even post-fermented, the possibilities to enjoy GABA are virtually endless. Come and brew a pot of GABA and experience true calm.


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About Mr. Hsu

May Zest Tea Co. Ltd was founded in 2001 by Mr. Hsu chien-chen. He has been selling tea since 1986, and one thing he often talks about, and is very proud of, is that his university tuition fees were all paid for from the sales of tea. Despite having studied Japanese at university and then working for a Japanese company for three years after graduation, he still couldn’t forget about the satisfaction of working in the tea industry. Eventually, he quit the job and joined the tea business to pursue his passion.

Internet Boom – Tea Boom

He started a company named May Zest (in 2001), and the business went well, partly due to the increased popularity of the Internet, where business is far-reaching with no boundaries. At that time, it was rather extraordinary that the company was able to receive orders from foreign countries even though it had never attended any overseas exhibitions. It ended up with the number of foreign customers increasing, and today 95% of customers are from other countries. Mr. Hsu’s GABA tea has been successfully marketed to more than 20 countries abroad including the USA, UK, Germany, Japan, Korea, Russia, Ukraine, Finland, Norway, Slovakia, Canada, Czech Republic…etc. and he is widely respected in the tea industry.

Seeking for a Perfect Cup of Tea

Mr. Hsu chien-chen insists that quality is of the utmost importance and always striving for a perfect cup of tea. For him, tea must be more than just good. It must have a pleasant aroma, smooth, great aftertaste, and unique characteristics, only then it will be perfect. In terms of other quality requirements, testing for any pesticide residues is also a priority for May Zest. After all, the main markets are Europe and the United States, so all of the popular teas must pass the EU standard SGS test, thus giving customers full confidence.


May Zest’s main product is GABA tea (Gamma-Amino-Butyric Acid), a tea rich in ethylbutyric acid that has been marketed in Taiwan for over 13 years. GABA Oolong tea is fermented in a vacuum for 10 hours before roasting, then stirred for 1.5 hours and this process is repeated 3 times before undergoing the traditional Oolong tea making process, which is the most delicate and complicated way of making tea. Over the past 10 years, 12 types of GABA teas have been successfully developed, varies on the level of fermentation, degree of roasting, origin and tea plant varieties.

For the past 16 years, May Zest has been working diligently to bring Taiwan’s premium GABA teas to consumers and raising the visibility of Taiwanese tea in the international arena. We are very pleased with the GABA tea from May Zest, and appreciate their insistence on quality.


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