How Is Tea Used as Medicine in Chinese Medicine?

In Chinese medicine, tea is more than a warm drink. It is one of the oldest medicines we have, and like any medicine it is chosen for the person drinking it. The question is never only "is tea good for you?" It is "which tea is good for you, today, in the weather you are carrying inside you?" Answer that, and one cup a day becomes a quiet daily treatment.

What does tea as medicine mean in Chinese medicine?

It means tea is chosen, not grabbed. In the Chinese medical tradition, everything you eat and drink has a temperature nature and a direction. Some things cool the body and calm heat. Some warm it and move circulation. Some dry dampness, some moisten dryness. Tea leaves were classified this way long before anyone measured a polyphenol, and the classification still guides how I think about a cup today.

The leaf itself is the same plant, Camellia sinensis, in nearly every true tea. What changes the medicine is processing. Green tea is barely oxidized. Oolong is partly oxidized. Black tea, which Chinese tradition calls red tea, is fully oxidized. Modern chemistry follows the same lines: green tea is rich in catechins, with EGCG the most abundant and most studied, while black tea carries theaflavins and thearubigins formed as the leaf oxidizes.^[1] The tradition read that change as a shift from cool to warm. The chemistry reads it as a shift in compounds. Both are describing the same leaf becoming a different medicine.

There is good reason to take a daily cup seriously. In the China Kadoorie Biobank, which followed 438,443 Chinese adults for a median of 11.1 years, daily tea drinkers had a lower risk of death from any cause than people who never drank tea (hazard ratio 0.92), and lower risks of death from ischemic heart disease (0.83), ischemic stroke (0.82) and hemorrhagic stroke (0.86).^[2] In the same cohort, daily tea drinkers had a lower risk of developing type 2 diabetes (0.92), and 85.8% of them drank green tea.^[3]

But a population study cannot tell you which cup is yours. That is where Chinese medicine comes in, and it is why I teach tea the way I do inside Gut Brain Synchrony, my community, where I put together a free guide listing which teas go with which weather and how to build the one-cup ritual.

Which tea is good for my body type in Chinese medicine?

The tea that is good for you is the one that balances your weather. I use the word weather on purpose. Chinese medicine describes the body the way a farmer describes a field: is it hot and parched, cold and slow, waterlogged and heavy, or dry and cracked? These are not moods. They are patterns that show up in how you sleep, digest, sweat, and feel the cold.

Modern Chinese medicine has turned this into a standardized questionnaire with nine body constitutions, one balanced and eight unbalanced. In a community study of 8,665 adults in Hangzhou, only 22.3% had the Balanced constitution. The most common unbalanced types were Qi Deficiency (16.4%), Phlegm Dampness (11.0%) and Yang Deficiency (9.4%), and more than half of the people with an unbalanced constitution had more than one at once.^[4] Most people are carrying some weather.

That weather matters beyond comfort. In a cohort of 8,462 young and middle-aged adults followed for a median of about 28 months, people with a Yang Deficiency constitution, the cold-sensitive type, had more than twice the risk of developing high blood sugar (hazard ratio 2.27). Phlegm Dampness (1.65) and Damp Heat (1.48) constitutions also carried higher risk.^[5] Reading your weather is an early-warning system, and tea is one of the gentlest daily ways to answer it.

If you run hot

You feel warm when others are comfortable, you get red in the face, you are thirsty, your sleep is restless, and you may break out easily. Your weather is a summer afternoon. Choose a cooling cup: green tea, white tea, or chrysanthemum.

If you run cold

Cold hands and feet, a preference for warm drinks, loose stools, low energy in the afternoon. Your weather is a winter morning. Choose a warming cup: black (red) tea, an aged dark tea, or fresh ginger. A small randomized crossover trial in ten overweight men found that a hot beverage of 2 g ginger powder taken with breakfast raised the thermic effect of the meal by about 43 kcal per day and lowered hunger over the following hours.^[6] That is the modern measurement of what Chinese medicine calls warming the middle.

If you feel damp and heavy

Bloating after meals, a foggy head, a heavy body, a thick coating on the tongue. Your weather is a humid, overcast day. Choose a cup that clears: oolong or a well-aged dark tea after food, and go easy on milk and sweeteners, which add to the damp.

If you feel dry

Dry skin, dry eyes, a dry throat, waking at night feeling warm. Your weather is a desert wind. Choose a gentle, moistening cup: a lightly brewed white or green tea, not too strong, sipped slowly rather than gulped.

Is green tea cooling or warming in TCM?

Green tea is cooling. Because the leaf is heated quickly to stop oxidation, it keeps its fresh, bitter, green character, and in Chinese medicine bitter and green point toward clearing heat. That is why green tea suits the person who runs hot, and why it is a natural summer tea.

Matcha, the shade-grown powdered green tea, is the most concentrated form. Green tea contains four main catechins, and matcha is their richest source, along with theanine, caffeine and chlorophyll.^[7] Concentrated means stronger in both directions: more of the benefits, and more of the cooling. If you already run cold, a big iced matcha every morning is working against your weather. I wrote about that in detail in Is Iced Matcha Good for You?

Green tea also carries the amino acid L-theanine, which is part of why a good cup feels calm and clear rather than jittery. A 2026 review of human trials found that 100 to 400 mg of L-theanine produced small but real improvements in attention, particularly in visual attention tasks and when combined with caffeine, and reduced perceived and physiological stress under stressful conditions without causing sedation.^[8] A meta-analysis of 31 randomized trials (1,168 people) found that a single 200 mg dose improved choice reaction time, a measure of focused attention.^[9] The tradition called this clearing the head. The lab calls it attention.

Is black tea warming or cooling?

Black tea is warming. Full oxidation turns the leaf dark and the liquor red, softens the bitterness, and gives it a rounder, sweeter taste. In Chinese medicine sweet and warm nourish the middle, the Spleen and Stomach, which is why black tea is the classic choice for someone who runs cold, digests slowly, or drinks tea in winter.

Oxidation changes the chemistry as much as the taste. The catechins of green tea are converted into theaflavins and thearubigins, the pigments that give black tea its color.^[1] Oolong sits between the two, partly oxidized, close to neutral, which makes it the tea I reach for when someone's weather is mixed or changing. Aged dark teas sit further toward the warm end.

All of them are flavonoid-rich, and that matters for the vessels. In 207,571 UK Biobank adults, those with the highest flavonoid intake had a 22% lower risk of developing atherosclerosis than those with the lowest, and the flavan-3-ols, the family tea catechins belong to, showed one of the strongest associations (hazard ratio 0.66).^[10] Green tea is also among the foods that support the gut's own release of GLP-1, the hormone that regulates blood sugar and appetite, through the gut microbiota and the short-chain fatty acids it produces.^[11] The cup works on the terrain, not only the symptom.

Why one cup, and not a pot?

Because medicine is about the right dose, and a ritual is about doing it every day. In a 2026 analysis of 360,548 UK Biobank participants, the relationship between tea and health outcomes was J-shaped. In people with fatty liver disease, the lowest risks fell between 1.6 and 2.5 cups a day, and 1 to 2 cups a day was linked to lower all-cause mortality (hazard ratio 0.85) and lower risk of cerebrovascular disease (0.83). At seven or more cups a day, cardiovascular risk was higher, not lower.^[12] More is not better. The right cup, regularly, is better.

The ritual itself is part of the medicine. In a small feasibility study, ten palliative care staff took part in a 20-minute simplified Japanese tea ceremony; their average state anxiety score fell from 51.5 to 44.2, and nine of the ten described a sense of sensory calm.^[13] Making one cup slowly, with attention, is a few minutes in which the nervous system is allowed to settle. In Chinese medicine, that settling is what lets the Spleen and Stomach do their work.

How to drink Chinese tea as a one-cup ritual

If your digestion is the weather you most want to change, start with Digestive Health: Start Here, and let the daily cup be one part of that larger picture.

Frequently asked questions

Is Chinese herbal tea good for you?

It is good for you when it matches you. That is the whole principle of tea as medicine. A cooling tea is a gift to someone running hot and a burden to someone running cold. Choose by your weather, not by the label on the box.

Is peppermint tea cooling in Chinese medicine?

Yes. Peppermint, bo he, is classed as cool and is used to clear heat from the head and throat. The cooling is not only a tradition: menthol activates TRPM8, the same ion channel in your nerves that senses cold, which is why peppermint feels cool even in a hot cup.^[14]

Which tea is warming?

Black tea, which Chinese tradition calls red tea, aged dark teas, and fresh ginger are the classic warming cups. They suit cold hands and feet, slow digestion and winter. If you run hot, keep them occasional and lean on green, white or chrysanthemum instead.

One cup, chosen for you, every day. That is how tea becomes medicine.

— Brehan Crawford, L.Ac.

References

1. Khan N, Mukhtar H. Tea Polyphenols in Promotion of Human Health. Nutrients. 2018;11(1):39. doi:10.3390/nu11010039
2. Nie J, Chen L, Yu CQ, et al. Association between tea consumption and all-cause mortality in Chinese adults. Zhonghua Liu Xing Bing Xue Za Zhi. 2022;43(2):145-153. doi:10.3760/cma.j.cn112338-20201201-01369
3. Nie J, Yu C, Guo Y, et al. Tea consumption and long-term risk of type 2 diabetes and diabetic complications: a cohort study of 0.5 million Chinese adults. Am J Clin Nutr. 2021;114(1):194-202. doi:10.1093/ajcn/nqab006
4. Wu YH, Wang J, Bai MH, et al. Prevalence of traditional Chinese medicine body constitutions in a large community-based study in Hangzhou, China. Chin Med. 2025;20(1):206. doi:10.1186/s13020-025-01268-x
5. Zhang JH, Zong YH, Li FL, et al. TCM Constitution and the Risk of Hyperglycemia in Young and Middle-Aged Adults: A Retrospective Cohort Study. J Diabetes Res. 2026;2026(1):e5548887. doi:10.1155/jdr/5548887
6. Mansour MS, Ni YM, Roberts AL, et al. Ginger consumption enhances the thermic effect of food and promotes feelings of satiety without affecting metabolic and hormonal parameters in overweight men: a pilot study. Metabolism. 2012;61(10):1347-1352. doi:10.1016/j.metabol.2012.03.016
7. Kochman J, Jakubczyk K, Antoniewicz J, et al. Health Benefits and Chemical Composition of Matcha Green Tea: A Review. Molecules. 2020;26(1):85. doi:10.3390/molecules26010085
8. Cotter J, Kilpatrick HE. Effects of L-theanine on cognition, mood and sleep: evidence from human trials. Front Nutr. 2026;13:1922819. doi:10.3389/fnut.2026.1922819
9. Gerolymos C, Saddier E, Boyer L, Fond G. Cognitive and affective effects of L-Theanine: a systematic review and meta-analysis of 31 randomized trials. Mol Psychiatry. 2026;31(11):6592-6602. doi:10.1038/s41380-026-03727-9
10. Tian J, Wang S, Chang X, Han Y. Association of dietary flavonoid intake with incident atherosclerosis: cohort evidence in middle-aged and older adults. Front Nutr. 2026;13:1746512. doi:10.3389/fnut.2026.1746512
11. Tkaczenko H, Kołodziejska R, Rymuszka A, et al. Foods as Modulators of GLP-1 Secretion. Nutrients. 2026;18(18):2995. doi:10.3390/nu18182995
12. Ryu T, Lee J, Han JW, et al. Dose-response relationship between tea consumption and mortality, cardiovascular, cerebrovascular, and renal outcomes in metabolic dysfunction-associated steatotic liver disease: a prospective cohort study. Front Nutr. 2026;13:1945413. doi:10.3389/fnut.2026.1945413
13. Nishikori S, Taruoka A, Kajita A, et al. A Simplified Tea Ceremony Experience for Palliative Care Staff: A Feasibility and Acceptability Study. Cureus. 2026;18(1):e100865. doi:10.7759/cureus.100865
14. Lee HJ, Park CG, Fedor JG, et al. Molecular basis for cold and menthol sensing by mammalian TRPM8. Nat Commun. 2026;17(1). doi:10.1038/s41467-026-76926-1