Green Herbal Tea: A Taiwan Folk Pharmacy Without a Signboard

In summer Wanhua, Taipei, you can still see bundles of leaves hanging at the entrances of shops along Xichang Street. These leaves are not decorations for a flower market, but the shelves of a green herbal tea shop. Jars, scissors, scales, and large pots inside the shop turn the act of "drinking tea" into something resembling a medical consultation. The strangest thing about green herbal tea in Taiwan is precisely that it has no fixed recipe, yet it has been recognized by generations as the same taste. ^{1 2}

30-Second Overview: Green herbal tea is not a fixed recipe, but a Taiwanese cultural practice that blends local herbs, green tea shop craftsmanship, summer drinking habits, and modern food safety standards. Reading this article, you will understand why it formed a street of shops in Wanhua, why each shop tastes different, and why "natural" cannot replace ingredient identification, labeling, and inspection. ^{1 2 3}

This is not simply "a cooling drink that Taiwanese people love." Green herbal tea is simultaneously a lesson in herb identification, a local commercial secret, care among regular customers, and a food safety boundary that must be navigated carefully. It places "my elders always drank it this way" and "can today's ingredients safely enter the body" in the same cup.

📝 Curator's Note: The most important ingredient in green herbal tea is not a specific herb, but the local memory of "someone knowing how to put them together."

Why Can a Cup of Tea Have No Recipe?

The Academia Sinica's Digital Collections project categorizes green herbal tea under several everyday names: cooling tea (liangcha), bitter tea, and hundred-herb tea. The names already reveal different expectations: cooling tea points to relief in the scorching heat, bitter tea retains the medicinal bitterness of herbs, and hundred-herb tea implies a pot mixed with multiple ingredients. The project records that there are over two hundred species of medicinal plants in Taiwan that can serve as ingredients for green herbal tea, with nearly a hundred commonly used. This is the scale of local knowledge; it does not mean every cup of tea must contain a hundred types of plants. ¹

A research paper on Taiwanese green herbal tea culture interviewed ten experts familiar with green herbal tea and used participant observation to understand production and consumption. The study points out that although the ingredients and preparation of green herbal tea have adjusted over time, some practitioners still retain the practice of boiling local green herbs. Consumers have built trust in it within the seasonal experience of "reducing internal heat, cooling down, and generating fluids to quench thirst." ²

Therefore, green herbal tea is not a recipe that can be copied down to the last gram. Materials preferred by shops in the north may differ from those in the central and southern regions. On the same street, each shop may also use its own ratios. This difference is not a failure, but a way for green tea shops to preserve growing environments, supply chains, master experience, and regular customers' tastes together. The recipe is guarded, much like Coca-Cola's secret formula, protecting business but potentially leaving certain old methods as only memories.

"Having no fixed recipe" does not mean "any herb can be boiled." The Academia Sinica data specifically reminds us that plants on roadside safety islands may be exposed to pesticides and pollution. Being able to recognize a name does not mean the source, processing method, and dosage are safe. The freedom of green herbal tea has never been a permit for arbitrary foraging. ¹

Three Plants Often Discussed

The "herbs" in green herbal tea are not a botanical classification, but a common name for materials suitable for tea among shopkeepers and families. To avoid mistaking common names for fixed recipes, the following only lists examples frequently mentioned in research and media data, separating "plant identity" from "drinking purpose." Plant photos can help readers understand appearance, but cannot replace professional identification.

Figure 1 | Field view of Platostoma palustre (Grass Jelly). Image by Awkwafaba, licensed under CC0 1.0 Public Domain. View File and License

Figure 2 | Leaf shape and variegated variety of Houttuynia cordata plants. Image by HelloMojo, released to the public domain. View File and License

The point of this table is not to teach people how to mix tea, but to remind readers that green herbal tea knowledge contains at least three layers. The first layer is plant identification; the second is how local shops process and combine them; the third is the consumer's understanding of taste and bodily sensations. Knowing only the first layer is insufficient to safely complete the latter two. ^{1 4 5}

_Figure 3 | Bidens pilosa (Beggar's Ticks) plant. Image by Harry Rose, licensed under CC BY 2.0, with name indicated as required by the original author. View File and License_

Plant photos on Wikimedia Commons provide another entry point for public knowledge. The Platostoma palustre photo is CC0, the Houttuynia cordata photo is released to the public domain by the author, and the Bidens pilosa photo is CC BY 2.0. This article uses them only as examples of appearance and licensing, not as proof of medicinal material identification, nor does it mistake free licensing for free foraging. ^{6 7 8}

Wanhua: Behind the Teacup Is a Supply Chain

From Green Herb Stalls to Urban Display Cases

The significance of Green Herb Alley lies not just in "where to buy." It places ingredients, knowledge, and trust in the same neighborhood, allowing customers to see fresh green herbs and understand the differences between dried medicinal materials, boiling, and preservation through the shopkeeper's explanations. This visibility is precisely what a packet of tea powder on a supermarket shelf cannot replace.

The process from origin to cup can also be broken down into several steps: plants are planted or collected, identified and organized, then boiled according to the shopkeeper's experience, and finally sold in a taste and container understandable to regular customers. Every step can change the flavor. Thus, "old shop taste" is not an abstract brand, but the result of long-term磨合 (friction/adaptation) between supply, time, utensils, and people. ^{1 2}

If you want to see how green herbal tea becomes urban life, Wanhua's Green Herb Alley is a concrete entry point. The National Cultural Memory Bank records that green tea shops originally concentrated fresh or dried medicinal herbs, boiling techniques, and local customer bases together. Among them, the old Ji'an Green Tea Shop moved and was redesigned, becoming the "Old Ji'an Healing Style Green Herbal Tea Bar," bringing the herbal culture that relied on regular customers' understanding into scenes of tea bars, displays, and introductions. ⁹

This transformation is somewhat counter-intuitive: the decrease in the use of green herbal medicine does not only represent the disappearance of tradition, but also prompts shopkeepers to change "how to drink" to "how to make young people willing to approach." Transformation cases recorded in the Cultural Memory Bank include changing decor, opening the tea bar for visits, introducing the use of Chinese medicinal herbs, and developing new green herbal tea drinks. Old shops are not sealing themselves in the past, but transforming a shop into a translation tool. ⁹

📝 Curator's Note: The modernization of green tea shops is not washing herbs into literary youth commodities, but giving judgments that were only in regular customers' minds a new chance to be seen.

The National Museum of Natural Science once organized "Cool Heart, Spleen Earth Open – Taiwan Green Herbal Tea Plant Special Exhibition" to organize local green herbal tea plants, boiling and preparation, drinking concepts, and development in Taiwan. This is worth remembering: green herbal tea is not only placed in stalls or family pots, but also displayed by museums as plant knowledge and living history. ⁴

From this perspective, green tea shops are not simply beverage retailers. They need to identify ingredients, handle fresh green herbs, master the heat, understand what life vocabulary "dryness," "heat," or "throat discomfort" might mean for guests, and then decide if they can just give a cup of tea. These judgments are not all written on the signboard, but constitute the shopkeeper's true expertise.

"Reducing Internal Heat" Is a Language of Life, Not a Medical Guarantee

The most easily misread aspect of green herbal tea is that it simultaneously uses food language and medicinal language. People say it cools down, reduces internal heat, and promotes diuresis, often describing bodily sensations and folk beliefs. These statements cannot be directly translated into "can treat a certain disease." Research collected by Airiti also points out that there is an idea among drinkers of "treating disease when sick, strengthening the body when healthy," but simultaneously there is a difference of "believers believe forever, non-believers disbelieve forever." ²

The boundary between medical care and food safety is not a rule modern people forced upon old shops. It actually always existed in the making of green herbal tea: Where do the ingredients come from? Are they correctly labeled? Are they beverages, food, or treated as medicine? Who is suitable to drink it? Who should ask a doctor first?

An article organized by a health media outlet, citing pharmacist opinions, reminds us that market green herbal tea formulas and ratios vary, and some products add sugar for taste. Pregnant women, those with cold constitutions, or those with poor gastrointestinal function should not treat green herbal tea as a fixed daily drink. Such information can serve as a risk reminder, but cannot replace individual medical consultation. ⁵

Food management gives this cup of tea another national perspective. The Food and Drug Administration (FDA) of the Ministry of Health and Welfare once announced a special inspection and sampling project for green herbal tea, stating that green herbal tea practitioners are included in the management scope of on-site prepared beverage food business registration, Good Hygiene Practices for Food, source documents, and sampling. ¹⁰

In the 2023 on-site prepared beverage and ice cream inspection project, the FDA explained that 371 practitioners were checked, and 408 beverages, ice products, and ingredients were sampled. These numbers are not proving that green herbal tea is dangerous, but explaining that "tradition" entering today's market must be responsible to consumers simultaneously. Official announcements noted deficiencies in labeling, insurance, and microbial hygiene standards for some practitioners; non-compliant products were handled by local health bureaus according to law. ³

📝 Curator's Note: Truly respecting green herbal tea is not guaranteeing it "natural means safe," but acknowledging that natural ingredients also need sources, labeling, and inspection.

Multiple Taiwans in One Pot

The history of green herbal tea is not a linear inheritance. The Academia Sinica project article describes Taiwan's green herbal tea knowledge as the accumulation of long-term local living experience, and mentions the intersection of foreign plants, medicinal herb usage from different places, and indigenous people's life wisdom. This intersection does not need to be romanticized into a pure, ancient recipe. It is more like a city's memory bank constantly exchanging plants and usage methods. ¹

Research papers make another change very clear: people have gradually shifted from foraging and boiling herbs themselves to buying from Chinese medicine pharmacies or green tea shops; selling locations, containers, and packaging have also changed. Green herbal tea thus left the backyard, entering takeout cups, refrigerators, souvenir gifts, and tea bars. ²

This also explains why green herbal tea can belong to both markets and families. Some remember their grandmother washing herbs and putting them in the pot; some remember the dark tea water in transparent plastic bags at the alley entrance in Wanhua; some first encountered it sitting at a redesigned bar counter, watching the shopkeeper unpack and explain a bundle of herbs.

The National Culture and Information Island (Bowu Zhidao)收录 (records) green herbal tea activities, placing medicinal green herbs, edible parts, seasons, and green herbal tea making into the educational context of local cultural centers. This means green herbal tea is not only inherited through drinking, but also through observation, identification, recording, and questioning. ¹¹

Inheritance Is Not Sealing the Old Taste

The challenges faced by green herbal tea are practical. Airiti's research points out that practitioners face legal restrictions and competition from other beverages, compressing their survival space. The National Cultural Memory Bank's Old Ji'an case shows that shopkeepers try to approach young people with new spaces, new drinking methods, and knowledge introductions. Looking at these two together, so-called inheritance is not maintaining the shop's appearance as is, but allowing core judgments to still be used in new lives. ^{2 9}

But transformation also has a cost. When green herbal tea becomes exquisite tea bags, flavored special drinks, or souvenirs, the gap between ingredient names, usage restrictions, and folk efficacy may be covered by packaging. When it is only "old-fashioned flavor" (guozao wei), the truly arduous work of identification disappears.

Therefore, a good green tea shop should not only let people drink a cup of tea, but also be willing to answer: What is inside? Where does it come from? How is it preserved? Who should not drink it? If the answer can only rely on "everyone drinks it this way," then modernization has not yet been completed.

Taiwan's green herbal tea is worth introducing not because it is more magical than cooling teas elsewhere, but because it preserves a contradiction of island life very completely: people believe in their elders' tongues, but also need today's inspections. Shopkeepers guard secret formulas, yet must also pass knowledge to the next generation. A cup of tea wants to keep the past, but can only find its place again in new urban rhythms.

Next time you see green herbs hanging at the door in Wanhua, do not rush to ask what it can cure. First ask where it comes from, who recognizes it, and who boiled it into this taste. You will find that what the dark tea water truly dissolves may not be an abstract "fire," but the growing thickness of strangeness between us and local life.

Text Sources

Below only lists the text sources supporting the article's history, culture, plant knowledge, food safety, and transformation narratives. Image files and license information are listed separately in the next section.

Image Sources and Licenses

Below only lists the file pages, authors, and licenses for the three plant images in this article. Images are embedded via Wikimedia Commons Special:FilePath hotlinks and not downloaded to the project.