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Hot Foods, Cool Foods: Taiwan's Everyday Food System (and What to Eat Before a Screening)
Order an iced americano in Taipei in January and nobody will stop you. But if you are with Taiwanese friends, watch their faces. Someone will probably ask, gently, whether you would like something warm instead. If you have a cold, the question will be less gentle.
You have just walked into one of the most pervasive organizing systems in Taiwanese daily life: the division of food into 熱 (hot) and 涼 (cool). It has nothing to do with the temperature of the dish, it governs an enormous amount of everyday eating, and it is the reason a Taiwanese grandmother can look at a bowl of watermelon in December and disapprove of it on principle.
What Do 熱 and 涼 Mean If Not Temperature?
In this framework every food carries a quality that is understood to push the body in one direction or another. Ginger, sesame oil, lamb, longan, and rice wine are 熱性 — warming. Watermelon, white radish, mung bean, bitter melon, and most raw vegetables are 涼性 — cooling. Many staples sit in the neutral middle.
The everyday vocabulary that follows is used constantly and completely unselfconsciously:
- 上火 (shàng huǒ) — "rising fire." Too much warming food, fried things, alcohol, or too little sleep. Blamed for mouth ulcers, sore throat, acne, constipation, and irritability.
- 退火 (tuì huǒ) — reducing that fire. This is why herbal tea stands (青草茶) and mung bean soup exist on hot afternoons.
- 體質 (tǐzhì) — your constitution. Some people are described as running hot, others cool, which changes what is recommended for them personally.
- 補 (bǔ) — to supplement or fortify, usually with warming food during winter or recovery.
When Is Taiwan's Winter Tonic Season?
Through the cold months, an entire category of restaurant becomes the center of social life: 薑母鴨 (ginger duck), 麻油雞 (sesame oil chicken), 羊肉爐 (lamb hotpot), and herbal hotpots simmered with medicinal ingredients. These are communal, steamy, alcohol-scented rooms full of families, and they are one of the great winter experiences in Taiwan.
The summer counterpart is equally organized: grass jelly, mung bean soup, winter melon tea, barley water, bitter tea, and the herbal-tea stands that appear on hot streets. Taiwanese fruit shops, night markets, and convenience stores all run this seasonal logic without ever explaining it.
The system also shapes postpartum care into a genuine industry. 坐月子 (zuò yuèzi), "sitting the month," is a structured recovery period after childbirth built around warming foods, rest, and avoiding cold — and Taiwan has professional postpartum care centers dedicated to delivering exactly that. Whatever you make of the underlying theory, a culture that treats postpartum recovery as a supported process with a defined length is doing something worth noticing.
Is There Science Behind the Hot–Cool System?
Honesty is more useful than either mockery or endorsement.
The hot–cool system is a cultural and traditional framework, not a description of physiology. There is no scientific basis for classifying watermelon as biophysically "cooling," and no clinical evidence that an iced drink causes illness. If someone tells you cold water will damage your uterus, that is folk belief rather than medicine.
What is also true: several behaviors this framework produces are harmless or mildly beneficial on their own terms. Drinking warm water instead of cold is a wash nutritionally but keeps people hydrated. Eating gently and avoiding alcohol while recovering from illness is reasonable. Structured postpartum rest with family support has real value. Seasonal eating tracks what is actually fresh. You can treat the system as a cultural map of how Taiwanese people talk about food and wellbeing, follow the parts you enjoy, and ignore the causal claims.
One caveat worth stating plainly: tonic dishes containing medicinal herbs are pharmacologically active, and "food" is not a synonym for "harmless." The US National Center for Complementary and Integrative Health reports that taking ginkgo with the blood thinner warfarin is associated with an increased risk of major bleeding, and that Asian ginseng might lower blood sugar levels. A 藥膳 broth is a supplement you drank. See our guide to Chinese and Western medicine in Taiwan for the interaction and disclosure points.
What Should You Eat Before a Health Screening in Taiwan?
This is where culture meets a practical schedule, and where visitors most often make avoidable mistakes. If you have a health screening booked, the following applies regardless of what you believe about food properties.
The instruction that wins is the one your facility sends you. Taipei Beitou Health Management Hospital tells its own patients to begin fasting the day before exactly as their notification slip directs, and writes that fast to include water and chewing gum — so "water is fine" is not a safe assumption. The same page tells patients on long-term medication to follow the slip on whether to stop or take each drug, to bring the medicine with them, and to take it after the fasting portion of the exam; to declare pregnancy or suspected pregnancy in advance; and to leave contact lenses out on the day so eye pressure can be measured.
The blood work sets the clock. MedlinePlus, the US National Library of Medicine's patient service, puts a cholesterol or triglycerides panel at 9 to 12 hours of fasting and liver function tests at 10 to 12 hours. It also states the rule visitors break most often: tell your provider about everything you take, and do not stop taking any medicine unless your provider tells you to.
| Timing | What to do | Why |
|---|---|---|
| When the slip arrives | Read the facility's own instruction sheet and follow it over anything else, including this article. | It is the only instruction that knows which tests are in your package. |
| Fasting window | Expect 9 to 12 hours for a cholesterol or triglycerides panel and 10 to 12 hours for liver function tests. Do not assume water is allowed — Beitou Health Management Hospital counts water and chewing gum as breaking the fast. | Broth, herbal tonic, tea with milk, and fresh juice are food. "It is just soup" invalidates a fasting result. |
| The night before | Skip the alcohol and the tonic hotpot; eat an ordinary dinner. | MedlinePlus lists drinking alcohol, smoking, and certain medicines or supplements among the things that affect a GGT liver result, and notes that GGT levels go down after meals. |
| Regular medicine | Bring it with you and take it after the fasting portion, unless the slip says otherwise. Do not stop anything on your own. | This is what Beitou Health Management Hospital instructs its own long-term medication patients to do, and MedlinePlus says the same about stopping drugs. |
| Tonics, herbal tea, supplements | Declare every one of them and ask when to stop each. The 藥膳 broth counts. | Ginkgo with warfarin is associated with increased major bleeding risk, and Asian ginseng might lower blood sugar — which is what a fasting glucose test is measuring. |
| On the day | Glasses, not contact lenses. Say so if you are or might be pregnant. | Eye pressure cannot be measured through a contact lens, and imaging plans change in pregnancy. |
| Afterwards | Eat whatever you like — this is the moment for the tonic hotpot. | No restriction applies once testing is complete, unless your physician says otherwise. |
If your screening includes a colonoscopy, the bowel-preparation diet overrides everything above and everything in this article. Follow the written instructions from the facility exactly.
New Dawn's screening tiers start with Convenient at $299, a 1.5-hour holistic exam that establishes a baseline, and Essential at $699; the imaging-led tiers run from Light at $1,399 to Plus at $3,099. Every tier and what it contains is on the packages page, and the preparation sheet that arrives with your booking is the instruction that decides whether the ginger duck happens the night before or the night after.
How Do You Enjoy the Food System as a Visitor?
- Go in the right season. Ginger duck and lamb hotpot in the winter; grass jelly, mung bean soup, and herbal tea in the heat of summer.
- Try a herbal tea stand. Ask for 青草茶 (qīngcǎo chá) or 苦茶 (kǔ chá) — the second is genuinely bitter and worth experiencing once.
- Accept the warm water. When a restaurant brings hot water instead of ice water, that is the default rather than an oversight.
- Ask what is in it. If a hotpot broth is described as 藥膳 (medicinal), it contains herbs. Fine to enjoy — just not the night before your blood draw.
- Do not argue the theory. Being told your cold drink is unwise is an expression of care. "謝謝, I will get a warm one next time" ends it warmly.
The Short Version
Taiwan sorts food into warming and cooling, talks about that sorting constantly, and builds whole restaurant categories and a postpartum care industry around it. Enjoy every part of it you want to. Then, in the days around a screening, let the clinic's instructions win — because the one thing that genuinely damages a health screening is not cold water, it is a lab result you cannot trust.
This article is general cultural and travel information, not medical or dietary advice. Always follow the specific fasting and preparation instructions given by your clinic, and consult your physician before changing any medication or supplement.
Sources
- Taipei Beitou Health Management Hospital — 健檢流程須知 (health examination process and notices) (accessed 2026-09-08)
- MedlinePlus, US National Library of Medicine — Cholesterol Levels: MedlinePlus Medical Test (accessed 2026-09-08)
- MedlinePlus, US National Library of Medicine — Triglycerides Test: MedlinePlus Medical Test (accessed 2026-09-08)
- MedlinePlus, US National Library of Medicine — Liver Function Tests: MedlinePlus Medical Test (accessed 2026-09-08)
- MedlinePlus, US National Library of Medicine — Gamma-glutamyl Transferase (GGT) Test (accessed 2026-09-08)
- US NIH National Center for Complementary and Integrative Health — Herb-Drug Interactions, NCCIH Clinical Digest (accessed 2026-09-08)
- US NIH National Center for Complementary and Integrative Health — Asian Ginseng: Usefulness and Safety (accessed 2026-09-08)
FAQ
The classification refers to a quality attributed to the food, not its serving temperature. Ginger, sesame oil, lamb, longan, and rice wine are considered 熱性 (warming); watermelon, white radish, mung bean, bitter melon, and most raw vegetables are 涼性 (cooling); many staples are neutral. The related everyday vocabulary includes 上火 (too much "fire" — blamed for mouth ulcers, sore throat, acne), 退火 (reducing it, often with herbal tea or mung bean soup), 體質 (personal constitution), and 補 (fortifying, usually with warming food in winter).
Within the hot–cool framework, iced drinks are seen as pushing the body toward "cold," which is thought to be unhelpful during illness, menstruation, and postpartum recovery. This is a cultural and traditional framework rather than a description of physiology — there is no clinical evidence that an iced drink causes illness. Being told your cold drink is unwise is an expression of care rather than a correction; a warm thank-you ends the conversation gracefully.
Two to three days before, eat normally but moderately and skip heavy tonic hotpots and herbal soups, whose medicinal ingredients can affect lab values. The night before, keep dinner light and low in fat and avoid alcohol — a high-fat meal can raise measured triglycerides, and alcohol affects both triglycerides and liver enzymes, producing numbers that reflect last night rather than your health. During the fasting window, follow the clinic's instruction exactly: broth, herbal tonic, milk tea, and fresh juice all count as food. If your screening includes a colonoscopy, the bowel-preparation diet overrides all of this.
It is a structured postpartum recovery period built around warming foods, rest, and avoiding cold exposure. Taiwan supports it with a professional industry of postpartum care centers dedicated to delivering that month of supported recovery. The underlying food theory is traditional rather than evidence-based, but treating postpartum recovery as a month-long supported process — rather than a brief inconvenience — is something Taiwan does notably well.
Roughly November through February, when ginger duck (薑母鴨), sesame oil chicken (麻油雞), lamb hotpot (羊肉爐), and herbal hotpots become the center of social eating. The summer counterpart is equally organized: grass jelly, mung bean soup, winter melon tea, barley water, and the herbal tea stands (青草茶) that appear on hot streets. If a hotpot broth is described as 藥膳, it contains medicinal herbs — enjoyable, but not the night before a blood draw.
