Chrysanthemum — Benefits Deep Dive

Chrysanthemum tea is drunk by hundreds of millions of people every day, and almost none of them are taking it as medicine. It is a caffeine-free floral infusion — 菊花 ju hua in Chinese, cúc hoa in Vietnamese, kek huai in Thai and Malaysian hawker centres — made from the dried flower heads of Chrysanthemum morifolium. These four articles cover the four things readers most often want from it: tired eyes, the "cooling" use in fevers and sore throats, antioxidant and cardiovascular claims, and the one genuinely consequential safety issue, daisy-family allergy.

Read the honest summary before the individual pages. This is a herb with an extraordinarily deep traditional record — nearly two thousand years of continuous documented use, an upper-grade classification in the Shennong Bencao Jing, named cultivars traded like fine tea — and a nearly empty human trial literature. Most published research is cell-culture and rodent work on its flavones (luteolin, apigenin, acacetin) and its phenolic acids (chlorogenic acid, dicaffeoylquinic acids). There is no randomized controlled trial showing that chrysanthemum tea improves vision, resolves a fever, or lowers blood pressure. Where these pages say "traditional use only," that is not a hedge — it is the actual state of the evidence.

Species matter here more than for almost any other herb, because three different plants share the name. The tea flower is Chrysanthemum morifolium. Chrysanthemum indicum (野菊花 ye ju hua, "wild chrysanthemum") is a separate pharmacopoeial drug with a different, stronger, more bitter use profile. And Tanacetum cinerariifolium — pyrethrum, once classified in the genus Chrysanthemum and still sold in garden catalogues as "chrysanthemum" — is the plant natural insecticide is made from, and must never be brewed. Every claim on these pages names the species behind it.

Table of Contents

1. Deep-Dive Articles
2. What the Evidence Actually Supports
3. Three Plants, One Name
4. Who Should Be Careful
5. Why Flower Quality Dominates Everything Else
6. Key Research Papers
7. External Resources
8. Connections

Deep-Dive Articles

What the Evidence Actually Supports

It helps to see the whole picture on one screen before reading any single claim in detail. The tiers below use the site's standard labels: randomized clinical trial, preliminary (animal, cell-culture or analytical work), and traditional use only.

• Composition of the tea — well established (analytical). The flavones and phenolic acids in chrysanthemum flower tea have been quantified by HPLC in several published analyses, and cultivar and flower colour measurably change the profile. This is the one area where the numbers are solid. It is chemistry, not a health outcome.
• Antioxidant capacity in a test tube — well established (analytical), clinically uninformative. Chrysanthemum infusions score highly on DPPH, ABTS and FRAP. So does coffee, and so does a glass of red wine. High chemical reducing power has repeatedly failed to predict disease outcomes in humans.
• Anti-inflammatory activity — preliminary. Extracts and isolated flavones suppress NF-κB signalling, nitric-oxide production and cytokine release in cultured cells, and reduce inflammation in rodent models. Consistent, broad, entirely preclinical.
• Eye complaints — traditional use only. No controlled human evidence that chrysanthemum tea improves visual acuity, dry eye, eye strain or any ophthalmic outcome. The traditional indication is internally coherent and nearly two thousand years old. That is a different kind of claim, and it should not be dressed up as a clinical one.
• Fever, sore throat, early colds — traditional use only. Chrysanthemum is a genuine component of classical wind-heat formulas. There is no trial of chrysanthemum tea for a respiratory infection.
• Blood pressure — traditional use only, with preliminary mechanism. Vasodilation, calcium-channel effects and ACE inhibition have been reported for flavonoid fractions in vitro. No adequately powered human trial of the tea exists.
• Antimicrobial activity — preliminary, and mostly about the other species. Strongest for Chrysanthemum indicum, which matches its traditional use for boils and sores. Inhibiting bacteria on an agar plate is not evidence of treating an infection.
• Allergic contact dermatitis and Asteraceae cross-reactivity — well established in humans. This is the item with the best human evidence on the whole page, and it is a risk rather than a benefit. Sesquiterpene lactone sensitisation is documented in the dermatology literature going back to the 1970s.
• Caffeine-free, pleasant, well tolerated by most people — established by two thousand years of ordinary use. Not a trial result, but not nothing either.

If you take one thing from this hub: the gap between chrysanthemum's preclinical literature and its human literature is the most important fact about it, and the same gap exists for most herbal teas. It does not make the tea worthless. It makes it a drink with a long cultural record rather than a treatment.

Three Plants, One Name

1. Chrysanthemum morifolium Ramat. — the tea and food plant, a domesticated cultigen with no wild population, bred in China over roughly fifteen centuries. Also published under the synonym Dendranthema morifolium, because the genus was split and re-merged during the twentieth century. Sweet, mild, faintly honeyed. The four famous grades — Hangbaiju, Gongju, Boju, Chuju — are all this species. Everything on these pages described as "the tea" is this plant.
2. Chrysanthemum indicum L. — 野菊花 ye ju hua, wild chrysanthemum. Smaller, deeper yellow, markedly more bitter, and a separate entry in Chinese pharmacopoeial practice with a different indication: stronger heat-clearing and "toxin-resolving" work for boils, abscesses, skin infections and severe sore throat, rather than a daily beverage. Much of the antimicrobial literature that gets loosely attributed to "chrysanthemum tea" was done on this species. If your tea is aggressively bitter, check the label.
3. Tanacetum cinerariifolium (Dalmatian pyrethrum, formerly Chrysanthemum cinerariifolium) and Tanacetum coccineum (painted or Persian daisy) — the pyrethrum plants. Their dried flower heads contain pyrethrins I and II, potent insect neurotoxins, and they are the chemical template for the entire synthetic pyrethroid class: permethrin, deltamethrin, cypermethrin. These are not tea plants. You are unlikely to meet pyrethrum in a Chinese grocery, but entirely likely to meet it in a garden centre or a seed catalogue labelled "chrysanthemum". The distinction genuinely alarms readers who discover it, and it deserves a straight answer: buy dried flower heads sold as food, from a food or herb supplier, and never brew ornamental or garden flowers of unknown species.

Two further plants get confused with chrysanthemum without any safety consequence. "Kunlun snow chrysanthemum" from Xinjiang, which brews deep red, is Coreopsis tinctoria — same family, different genus, not ju hua. And chrysanthemum greens (tong hao, Japanese shungiku), the leafy vegetable in hot pot, are Glebionis coronaria, formerly Chrysanthemum coronarium. Those leaves are food. They are not the tea flower.

Who Should Be Careful

Most people can drink chrysanthemum tea without a second thought. These are the groups for whom that is not true, and the allergy group matters most.

• Anyone with a known Asteraceae / Compositae allergy. Ragweed hay fever, mugwort sensitivity, a chamomile reaction, feverfew intolerance, marigold or calendula rash, arnica dermatitis, echinacea reaction. The family shares sesquiterpene lactone allergens, and cross-reactivity within it is a recognised clinical pattern rather than a theoretical one. Read Allergy Risk, Preparation and Safety before you try it.
• Florists, nursery workers and chrysanthemum growers. Occupational hand and airborne facial dermatitis from handling cut chrysanthemums is well documented, and handling the flowers is a far higher-exposure route than drinking a weak infusion of them.
• People with sulphite-sensitive asthma. Sulphur fumigation is used in the dried-flower trade to bleach and preserve material, and heavily fumigated flowers can carry sulphite residues.
• Anyone with a real eye problem. Persistent blurred vision, eye pain, new floaters, flashes, a change in your visual field, or redness that will not settle needs an eye examination. Tea is not a substitute, and delay can cost sight.
• People on antihypertensive or antidiabetic medication. If chrysanthemum has genuine hypotensive activity — unproven — it would be additive. Keep measuring, and do not adjust prescribed doses on your own.
• Pregnancy and breastfeeding. The tea is drunk during pregnancy across East Asia and is not traditionally regarded as an abortifacient, but there is no modern human safety data, and traditional practice cautions against "cold" herbs in pregnancy and the postpartum period. Occasional tea is very unlikely to matter; concentrated extracts should be avoided.
• Anyone drinking the canned or bottled version several times a day. Many contain as much sugar as a soft drink. For those readers the sugar is the health variable, not the flavones.

Why Flower Quality Dominates Everything Else

An awkward but useful fact runs through all four articles: how the flowers were grown, dried and brewed changes the cup far more than any subtlety of pharmacology. Published analytical work has repeatedly shown that cultivar, flower colour and processing shift the flavone and phenolic-acid content of chrysanthemum flower tea substantially. Steep time and water temperature then decide how much of that ends up in your cup. Between a premium taiju bud brewed three minutes at just off the boil and a bag of broken flowers boiled for a quarter of an hour, the difference in extractable polyphenol is not a rounding error — and the second cup will also be far more bitter.

Three practical consequences:

1. Buy whole intact flower heads by cultivar name where you can — Hangbaiju and its taiju buds for drinking, Gongju for a cleaner and more aromatic cup, Boju and Chuju as the traditional medicinal grades. Crumbs and dust in the bag mean broken flowers, which brew more bitter and less sweet.
2. Distrust uniform bleached-white flowers with a sharp acrid smell. That is the signature of heavy sulphur fumigation. Natural colour is creamy or pale gold.
3. Pesticide residue is a legitimate consideration in cheap floral tea. Flowers are not washed the way vegetables are, they are dried whole, and the whole residue load has the chance to move into the infusion. Residue surveys of dried flower and herbal teas have found detectable multi-residue contamination often enough that the question is reasonable rather than alarmist. This is an argument for buying from suppliers who publish residue testing, not an argument for avoiding the tea.

The same logic applies to the sweetened ready-to-drink cans and bottles that are, in practice, how most chrysanthemum tea in the world is consumed. Whatever the flower contributes, a 20–30 g sugar load per serving is the dominant health variable in that product, and it is worth reading the label rather than assuming a floral tea is automatically a healthy drink.

Key Research Papers

Every citation on this hub and its four sub-articles is given as a PubMed topic search rather than a numeric identifier. That is deliberate: this site previously carried numeric IDs at scale and a large fraction of them pointed at the wrong paper — usually a near-miss in the same journal issue. A topic search cannot silently drift.

The species, its chemistry and its pharmacopoeial identity

1. Liu Y and colleagues, “Chrysanthemum morifolium as a traditional herb: a review of historical development, classification, phytochemistry, pharmacology and application”, Journal of Ethnopharmacology (2024) — the most comprehensive recent review of the species, and the best single starting point. Find it on PubMed.
2. Yuan H and colleagues, “The flower head of Chrysanthemum morifolium Ramat. (Juhua): a paradigm of flowers serving as Chinese dietary herbal medicine”, Journal of Ethnopharmacology (2020) — treats the flower explicitly as a food-medicine, which is how it is actually used. Find it on PubMed.
3. Reviews of the Chrysanthemum indicum literature, which repeatedly document a distinct and more strongly antimicrobial profile from the tea species. PubMed topic search.

The eye and liver indication

1. Xiong S and colleagues, “Research progress on pharmacological effects against liver and eye diseases of flavonoids present in Chrysanthemum indicum L., Chrysanthemum morifolium Ramat., Buddleja officinalis Maxim. and Sophora japonica L.”, Journal of Ethnopharmacology (2025) — addresses the traditional eye indication directly, and in doing so shows how thoroughly preclinical the evidence is. Find it on PubMed.
2. Preclinical work on luteolin in models of retinal oxidative stress and light-induced retinal injury. PubMed topic search.
3. The clinical literature on digital eye strain and dry eye, which is where a reader with tired eyes will find findings that actually apply to humans. PubMed topic search.

Antioxidant chemistry and the cardiovascular claim

1. Han AR and colleagues, “Phytochemical composition and antioxidant activities of two different color chrysanthemum flower teas”, Molecules (2019) — quantifies the flavones and phenolic acids in the actual drink rather than in a solvent extract. Find it on PubMed.
2. Han AR and colleagues, “Quantification of antioxidant phenolic compounds in a new chrysanthemum cultivar by HPLC with diode array detection and electrospray ionization mass spectrometry”, International Journal of Analytical Chemistry (2017). Find it on PubMed.
3. Zou P, “Traditional Chinese medicine, food therapy and hypertension control: a narrative review of Chinese literature”, American Journal of Chinese Medicine (2016) — useful context for the blood-pressure claim, and a fair illustration of how weak the underlying evidence is. Find it on PubMed.
4. The randomized-trial literature on hibiscus and blood pressure, included as a contrast — this is what a herb's evidence base looks like when trials exist. PubMed topic search.

Asteraceae allergy and contact dermatitis

1. Bleumink E, Mitchell JC, Geissman TA and colleagues, “Contact hypersensitivity to sesquiterpene lactones in chrysanthemum dermatitis”, Contact Dermatitis (1976) — foundational work identifying the responsible allergen class. Find it on PubMed.
2. Hausen BM and Schulz KH, “Chrysanthemum allergy III: identification of the allergens”, Archives of Dermatological Research (1976). Find it on PubMed.
3. Mak RK, White IR, White JM and colleagues, “Lower incidence of sesquiterpene lactone sensitivity in a population in Asia versus a population in Europe: an effect of chrysanthemum tea?”, Contact Dermatitis (2007) — the oral-tolerance hypothesis, framed by its own authors as speculation. Find it on PubMed.
4. The wider Compositae dermatitis and sesquiterpene-lactone-mix patch-testing literature. PubMed topic search.

Quality: fumigation, residues, polysaccharides and brewing

1. Zhang ZJ and colleagues, “Review of polysaccharides from Chrysanthemum morifolium Ramat.: extraction, purification, structural characteristics, health benefits, structure–activity relationships and applications”, International Journal of Biological Macromolecules (2024) — a large preclinical literature on a fraction that a short hot-water steep barely extracts. Find it on PubMed.
2. Work on sulphur fumigation of Chinese herbal materials and its effect on constituents and residues. PubMed topic search.
3. Pesticide-residue surveys of dried flower, herbal and floral teas. PubMed topic search.

External Resources

• PubMed — Chrysanthemum morifolium, everything — the whole literature, unfiltered. Note how much of it is in vitro.
• PubMed — chrysanthemum clinical trials — worth running yourself, because the shortness of the result list is the point.
• NCCIH — Herbs at a Glance — the US National Center for Complementary and Integrative Health's plain-language herb summaries.
• Plants of the World Online (Kew) — the authority for sorting out Chrysanthemum, Dendranthema, Tanacetum and Glebionis synonymy.
• DermNet NZ — Compositae dermatitis — clinical description of the daisy-family contact allergy, with photographs.
• US EPA — Pyrethroids and Pyrethrins — the regulatory page for the insecticide compounds derived from pyrethrum, so you can see exactly what the other "chrysanthemum" is.
• American Academy of Ophthalmology — Eye Health — where to read about eye strain, dry eye, and when symptoms need examining.

Connections

• All Herbs
• Chrysanthemum (Chrysanthemum morifolium) — the main topic page: names, cultivars, traditional use, compounds, dosage and cautions.
• Luteolin — the signature flavone of chrysanthemum, with its own full page.
• Apigenin — the other major chrysanthemum flavone, and the one chamomile is best known for.
• Luteolin — Allergy and Mast Cells — the flavone's own relationship with allergic signalling, which is a separate question from allergy to the plant.
• Chamomile — Benefits — the other great Asteraceae flower tea, sharing both the apigenin and the allergy caution.
• Feverfew — Benefits — a daisy-family herb with real trial data, and a key cross-reactor to know about.
• Hibiscus — Blood Pressure — the contrast case: a floral tea whose cardiovascular claim has randomized trials behind it.
• Green Tea — Benefits — the caffeinated comparison, and a much larger human literature.
• Contact Dermatitis — what chrysanthemum handlers actually develop.
• Blurred Vision — the symptom that should send you to an eye examination rather than to tea.
• Dry Eye Disease — the diagnosis most often behind "tired, gritty eyes".

Safety and disclaimer. This hub is educational and is not medical advice. Chrysanthemum is a member of the Asteraceae, and anyone with a known ragweed, mugwort, chamomile, feverfew, marigold or arnica allergy should treat it with real caution and read the allergy page first. Nothing here supports using chrysanthemum in place of diagnosis or treatment: persistent eye symptoms need an eye examination; a fever that is high, prolonged, or accompanied by confusion, stiff neck, rash or breathlessness needs medical assessment; and blood-pressure medication should never be changed on the strength of a herbal tea. Do not brew flowers of unknown species, and never brew pyrethrum. Talk to a clinician or pharmacist before adding concentrated chrysanthemum extracts to any prescribed regimen, and during pregnancy or breastfeeding.

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