Tisane vs Tea: What Counts as "Tea" and Why It Matters
What the sources mean by tea and by tisane (herbal tea), which familiar drinks are which, and why the difference matters for caffeine, research and labels.
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Short answer: in the sources we read, "tea" means a drink from the tea plant, Camellia sinensis. A tisane (herbal tea) is an infusion of any other plant. Both can look alike in a cup, but they are different plants with different caffeine, different research and different cautions. Information only; ask a pharmacist or clinician about your own situation.
How the sources define the words
| Term | How the source defines it | Source |
|---|---|---|
| Tea | An infusion from the young leaves, leaf buds and internodes of Camellia sinensis or Camellia assamica | Review of tea and herbal beverages [1] |
| Green, black, oolong tea | The same plant, Camellia sinensis, prepared by different methods (black tea is fermented, oolong partly fermented) | NCCIH (US) [2] |
| Tisane, herbal tea | The infusion of plants other than Camellia sinensis; it looks and is prepared like tea but is not tea | Review of tea and herbal beverages [1] |
| Herbal tea (EU regulatory sense) | One or more herbal substances prepared by decoction, infusion or maceration; the term also names the resulting drink (tisane) | EMA/HMPC leaflet template, 2016 [3] |
| Crossover blend | Herbs combined with Camellia sinensis, for example black tea with rose petals, cinnamon or clove | Review of tea and herbal beverages [1] |
We checked the accepted name Camellia sinensis (L.) Kuntze against GBIF. [4]
Names that cause confusion
- Rooibos (Aspalathus linearis) is brewed from leaves and is called a herbal infusion, not a tea from Camellia sinensis. [5] "Green rooibos" refers to unfermented rooibos, not to green tea. [6]
- Jasmine tea can be green tea scented with flowers: one study describes scented green tea made with Jasminum sambac and other flowers. [7] Whether a jasmine product is a flower-only tisane or a tea-based product has to be read on the label.
- Yerba mate (Ilex paraguariensis) is made from dried, crushed leaves and twigs of a holly, not from Camellia sinensis, and it has measured caffeine. [8] See the yerba mate guide.
- Chamomile, peppermint and similar teas are single-herb teas, a type of tisane. [1] In the EU some of these are also sold as traditional herbal medicines: matricaria (chamomile) flower products include herbal teas, and the EMA's conclusion rests on traditional use rather than strong clinical trials. [9]
Why the difference matters
| Question | What the sources found | Strength of evidence |
|---|---|---|
| Caffeine | FDA lists typical caffeine in a 12-fluid-ounce drink as green tea 37 mg and black tea 71 mg. [10] A review says herbal teas do not contain caffeine, but some herbal drinks do. [1][8] | Regulator figures (tea); review statement and lab measurement (herbs) |
| Research | NCCIH says definite conclusions cannot yet be reached on whether green tea is helpful for most of the purposes for which it is used. [2] Findings for green tea do not carry over to a different plant. | Mixed for green tea; for each herbal tea see its own guide |
| Labels | EMA documents define herbal substances by plant part and botanical name. [3] Look for both on a label. | Regulatory definition |
Frequently asked questions
What is a tisane?
A tisane is another word for herbal tea: an infusion of plants other than Camellia sinensis. [1]
Is rooibos a tea?
Not in the sense used by these sources. Rooibos comes from Aspalathus linearis leaves and is described as a herbal infusion. [5]
Is chamomile tea a true tea?
No. Chamomile tea is a single-herb tea from the flower heads of the chamomile plant, so it is a tisane. [1][9]
Does "herbal tea" mean it is a medicine?
Not necessarily. In the EU, some herbal teas can be sold as traditional herbal medicines, based on long use rather than strong trial evidence. [9] How any particular product on a shelf is classified is not described in the sources we read, so check the label.
Is green rooibos the same as green tea?
No. The source describes green rooibos as unfermented rooibos, not green tea. [6]
More details: evidence, limits and cautions
The details behind this page: cautions, limits of the evidence and where sources disagree. Open any note to read it.
Limits and uncertainty
Safety and who should ask
References
- Huda HS, Majid NBA, Chen Y, et al. Exploring the ancient roots and modern global brews of tea and herbal beverages: A comprehensive review. Food Sci Nutr. 2024. PubMed 39479640. Read 2026-10-23.
- National Center for Complementary and Integrative Health (NIH). Green Tea: Usefulness and Safety. Read 2026-10-23.
- European Medicines Agency, Committee on Herbal Medicinal Products (HMPC). Patient Leaflet template concerning advice on the preparation of herbal teas as (traditional) herbal medicinal products by end-users, EMA/HMPC/30603/2012, adopted 20 September 2016. Read 2026-10-23.
- GBIF Secretariat. GBIF Backbone Taxonomy, species match service (api.gbif.org/v1/species/match). Names checked 2026-10-23.
- Pyrzanowska J, et al. Aspalathus linearis infusion affects hole-board test behaviour and amino acid concentration in the brain. Neuroscience letters. 2021. PubMed 33529651. Read 2026-10-23.
- López V, et al. Neuroprotective and anxiolytic potential of green rooibos (Aspalathus linearis) polyphenolic extract. Food & function. 2022. PubMed 34877951. Read 2026-10-23.
- Hou Z, et al. Comparison of Volatile Compounds in Jingshan Green Tea Scented with Different Flowers Using GC-IMS and GC-MS Analyses. Foods (Basel, Switzerland). 2024. PubMed 39272418. Read 2026-10-23.
- Najman K, et al. Changes in the Physicochemical and Bioactive Properties of Yerba Mate Depending on the Brewing Conditions. Molecules (Basel, Switzerland). 2024. PubMed 38893465. Read 2026-10-23.
- European Medicines Agency, Committee on Herbal Medicinal Products (HMPC). Matricariae flos (matricaria flower) - herbal medicinal product (public page). Read 2026-10-23.
- U.S. Food and Drug Administration. Spilling the Beans: How Much Caffeine is Too Much? Consumer update. Read 2026-10-23.