LAISHA · DRAVYAGUNA

Nagakeshara

नागकेशर

Mesua ferrea L.

Calophyllaceae · Mesua

Benefits & side effects

TRADITIONAL VIEW, WITH SAFETY LIMITS

Hindi name: Nagkesar

What the texts say Nagakeshara does

What the evidence says. Traditional use is extensive and long recorded. Modern clinical evidence is limited.

Side effects and limits

Avoid or ask first: Pregnancy, in medicinal quantity.

A traditional classification, not a recommendation. The full safety record is below.

Stands in 6 groups

A Samhita can only be read forwards, from the group to its members. This is the same list read backwards.

Photographs

Matra and anupana

AS THE CLASSICAL TEXTS AND THE API PRESCRIBE

Churna1–3 g
AnupanaMadhu · Tandulodaka
KalaAdhobhakta

The dried stamens are the drug. Mammea suriga is widely substituted.

Reported from Sharangadhara Samhita and the Ayurvedic Pharmacopoeia of India. Laisha states what the texts prescribe; it does not recommend. No quantity here is adjusted for a particular person — not for agni, koshtha, bala, age, pregnancy, kidney or liver function, or anything already being taken.

Rasapanchaka

Rasa
KashayaTikta
Guna
LaghuRuksha
ViryaUshna
VipakaKatu
PrabhavaThe texts treat nagakeshara as grahi and as acting on bleeding, and it is named for that more often than for its aroma.
DoshakarmaKaphapittahara.

Kashaya and tikta with ushna virya and katu vipaka. Kashaya predominant, which is what the texts rely on for its grahi action.

Karma and part used

GrahiRaktastambhanaDeepanaKandughnaSwedahara

These are the actions the classical texts record. They are statements about what the tradition holds, and this library does not restate them as findings about a human body.

Upayukta angaKesara (the stamens)
Pushpa (the flower)
Why it mattersThe dried stamens of the flower are the dravya — the golden threads, not the petals. This is one of the few dravya in the library where the article is a single floral part, and it is the reason it is costly.

Paryaya

ChampeyaKesaraNagapushpaKanchanaHema

Kesara means stamen or filament and says exactly what the article is. Hema and Kanchana both mean gold and describe the colour of the dried stamens, which is also how adulteration is spotted.

Names, by language

EnglishCeylon ironwood
SinhalaNa
NepaliNagkesar
HindiNagkesar
KannadaNagasampige
TamilNagappu
TeluguNagakesaramu
MalayalamNagappovu
MarathiNagchampa
GujaratiNagkesar
BengaliNageswar
PunjabiNagkesar
OdiaNageswara
UrduNarmushk

Classical references

Bhavaprakasha Nighantu
Karpuradi Varga
Gives the rasa, guna, virya and vipaka of nagakeshara and names it among the four aromatics.
Charaka Samhita
Sutrasthana, chapter 4 (Shadvirechanashatashritiya)
Named among the dravya of the chapter.
Sushruta Samhita
Sutrasthana, chapter 38 (Dravyasangrahaniya)
Included among the dravya grouped by action.

Rasa, guna, virya, vipaka and karma are recorded as the classical texts give them, with the text and section named so a student can open the book and check. Where an exact chapter and verse could not be confirmed, this library names the section rather than inventing a number.

Formulations it appears in

Chaturjata ChurnaOne of the four aromatics, with ela, twak, patra and nagakeshara.
Sitopaladi ChurnaAmong the dravya of the formulation.
ChyawanprashAmong the dravya of the formulation.
Pushyanuga ChurnaNagakeshara is among the principal dravya.

Adulterants and substitutes

This is among the most adulterated dravya in the trade, because the article is a small quantity of dried stamens and is expensive. Ochrocarpus longifolius is sold as Nagakeshara openly and is sometimes called Pila Nagkesar. Dried stamens of other flowers, and simple dyed plant fibre, are also used. The dried stamen of Mesua ferrea has a distinct anther head on a fine filament, and a heap that is uniformly thread-like without anthers is not this dravya.

Identity

Matched live against the GBIF backbone on 28 September 2026 at 99 per cent confidence. The fourth of the Chaturjata aromatics. A widely traded substitute, Ochrocarpus longifolius, is a different plant and is discussed below.

A WAY TO REMEMBER IT

Mesua honours John Mesue. Ferrea means iron — the wood is so hard and heavy it sinks in water. Naga-keshara means serpent-stamen, for the mass of golden stamens.

What the tradition holds

Nagakeshara is named among the four aromatics of Chaturjata in the Bhavaprakasha Nighantu and is recorded as grahi. That is what the tradition holds and where it is written down, not a finding about what the stamen does in a body.

Constituents. The stamens carry coumarins including mesuol and mammeisin, along with an essential oil.

What the evidence says

StatusTraditional use is extensive and long recorded. Modern clinical evidence is limited.
SuggestedHealth Canada publishes monographs covering Ayurvedic ingredients and permits specific traditional-use claims, which reflects a regulator accepting a documented tradition rather than a body of clinical trial evidence.
Not establishedThere is not enough good clinical evidence to establish an effect on any named health condition. Long traditional use is not a substitute for that evidence, and this library does not present it as one.
The honest gapPublished work frequently does not confirm which plant the material came from, which given the adulteration above is a serious limit.

Safety

No serious harm is documented for this dravya at traditional use, which is a statement about the absence of records and not a guarantee. The practical risk with nagakeshara is not the plant but the substitute: material bought without verification is often not this plant at all, and what it actually is may be unknown. Anyone on medication, pregnant, or managing a diagnosed condition should speak to a doctor or a qualified practitioner first.

Side effectsDigestive upset
ContraindicationsPregnancy, in medicinal quantity.
InteractionsNo specific drug interaction is documented for this dravya. That is the honest state of the evidence, not a statement that none exists — most Ayurvedic dravya have never been studied for interaction. Tell the prescribing doctor it is being taken.
Confirm the material: Mammea suriga is widely substituted for Mesua ferrea.
Pregnancy and breastfeedingNot to be used in medicinal quantity in pregnancy without a qualified practitioner. There is not enough evidence to establish safety in breastfeeding.

Growing it

ClimateWet tropical, in evergreen forest of the Western Ghats, the north-east and Sri Lanka.
SoilDeep, moist, well-drained forest ground.
PlantingA slow-growing tree, raised from seed. Among the hardest timbers in India, which is why it is called ironwood.
HarvestFlowers are collected at opening and the stamens separated and dried in shade.
What is not statedCollection is from wild and planted trees, and because the yield of stamens per tree is small this is a dravya where honest supply is genuinely scarce — which is the economic reason behind the adulteration described above.

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What this is not

Sources

GBIF Backbone Taxonomy species-match record for Mesua ferrea L.
Global Biodiversity Information Facility (GBIF) · read 2026-09-28
Confirming live, rather than from memory, the accepted botanical name and family behind the Sanskrit name.
https://api.gbif.org/v1/species/match?name=Mesua%20ferrea
The Ayurvedic Pharmacopoeia of India — Nagakeshara (Mesua ferrea L.)
Pharmacopoeia Commission for Indian Medicine and Homoeopathy, Ministry of Ayush, Government of India · read 2026-09-28
The official Indian pharmacopoeial standing of the dravya and the identity of the part used as the pharmacopoeial article.
https://pcimh.gov.in/
Compendium of Monographs — Natural Health Products
Health Canada, Natural and Non-prescription Health Products Directorate · read 2026-09-28
A regulator outside India that publishes monographs covering Ayurvedic ingredients — used for the safety framing, and for the line between a permitted traditional-use claim and clinical evidence.
https://www.canada.ca/en/health-canada/services/drugs-health-products/natural-non-prescription/applications-submissions/product-licensing/compendium-monographs.html
Classical matra by dose form
Sharangadhara Samhita, Madhyama Khanda
The classical quantity for each dose form, as the standard reference gives it. Sharangadhara is where Ayurveda's dose forms and their measures are set out, and it is what every Dravyaguna textbook reproduces.
https://niimh.nic.in/ebooks/esharangadhara/
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