Nagakesara in Ayurveda: Properties & Everyday Use

What it is

Nagakesara is the dried stamen of Mesua ferrea L. (family Calophyllaceae; older texts place it in Guttiferae), an evergreen tree native to South and Southeast Asia: Bangladesh, India, Sri Lanka, Myanmar, Thailand and southern Nepal (Ahmed et al., J Pharmacogn Phytochem 2024). Its English names include Nagkesar, Ceylon ironwood and "cobra's saffron": it is not true saffron (same review). The fragrant white flowers carry a center of numerous yellow stamens, and the powdered stamen is the part used as the drug; seeds, fruit, leaves, bark and root oil are also employed (same review). Reported constituents include xanthones, coumarins (mesuol, mammeisin), flavonoids and tannins (same review).

Classical properties

• Taste (rasa): astringent (Kashaya)
• Qualities (guna): light (Laghu), dry (Ruksha)
• Potency (virya): warming (Ushna)
• After digestion (vipaka): pungent (Katu)
• Doshas: traditionally said to settle Pitta and Kapha; may increase Vata

Traditional use

In Ayurveda, nagakesara is valued chiefly as a haemostatic (raktastambhaka): a drug used to check bleeding. Classical indications include raktarsha (bleeding piles), raktapradara (excessive menstrual bleeding) and raktatisara (dysentery with bleeding), alongside fever, leucorrhoea and skin disorders (GSCBPS critical review, 2026). Unani medicine, which also uses the drug as Nagkesar, lists haemostatic, anti-diarrhoeal, stomachic and anti-inflammatory actions, with traditional applications in haemorrhoids, dysentery, ulcers, leucorrhoea and fever (Ahmed et al. 2024). A frequently cited classical preparation is nagakesara powder given with butter and sugar for bleeding piles (same review). These are traditional uses, not clinical proof: the human evidence is assessed separately below.

What research has looked at

Bleeding piles (small human studies)

The only human data found are small and preliminary. Paranjpe et al. evaluated a polyherbal formulation containing M. ferrea for bleeding piles in 22 subjects. 16 showed improvement in bleeding with no noticeable adverse effects: a preliminary, uncontrolled finding for a combination product, not for nagakesara alone (as summarized in Ahmed et al. 2024). A 2017 two-arm trial enrolled 30 patients with first- and second-degree bleeding piles to compare nagkesar churna against a wheat-flour placebo (Sharma et al., WJPR 2017). Both studies are small; no large or well-controlled randomized trial of nagakesara alone was found.

Pharmacology (animal and laboratory studies)

Reviews catalogue antioxidant, anti-inflammatory, analgesic, antispasmodic, hepatoprotective, antimicrobial and other activities of M. ferrea extracts (Ahmed et al. 2024). Nearly all of this work is preclinical, cell cultures and animal models, and does not establish any effect in people.

What the evidence does not support (yet)

There are no human trials supporting nagakesara for heavy menstrual bleeding, bloody diarrhea, or any of the other classical indications beyond the small piles studies above. Traditional use for bleeding disorders is not clinical proof that it stops bleeding.

Safety notes

There are no systematic human safety studies of nagakesara. The small piles studies reported no noticeable adverse events, but they were brief and tiny. Traditional Unani sources caution against its use in liver and bladder complaints and in people of "hot temperament" (Ahmed et al. 2024). Safety in pregnancy and breastfeeding has not been studied: avoid use without a qualified practitioner. Do not use nagakesara to self-treat undiagnosed rectal bleeding, heavy periods or bloody diarrhea; these symptoms require a clinician to rule out serious causes.

FAQs

What is nagakesara?

Nagakesara is the dried stamen (the pollen-bearing filament) of the Mesua ferrea flower, an evergreen tree of South and Southeast Asia also called Ceylon ironwood (Ahmed et al. 2024).

Is nagakesara the same as saffron (kesar)?

No. Despite the English name "cobra's saffron," nagakesara is the stamen of Mesua ferrea: a completely different plant from true saffron (Crocus sativus) (Ahmed et al. 2024).

Does nagakesara help bleeding piles?

Evidence is preliminary at best: one small uncontrolled study of a polyherbal formula containing M. ferrea reported improvement in 16 of 22 subjects, and one small two-arm trial compared nagkesar churna with placebo (Ahmed et al. 2024; Sharma et al. 2017). This is not proof of efficacy.

Does nagakesara help heavy menstrual bleeding?

That is a classical Ayurvedic indication (raktapradara), but no human trial has tested it (GSCBPS critical review, 2026). Heavy periods need medical evaluation for underlying causes.

What is the recommended dose of nagakesara?

Swastik does not suggest amounts. The right amount depends on the person, the preparation and the product, so check with a qualified Ayurvedic practitioner or your doctor before taking any herb.

Is nagakesara safe in pregnancy?

Safety in pregnancy and breastfeeding has not been studied. Avoid use without guidance from a qualified practitioner.

Sources

• Ahmed R, Ahmed MW, Khan AS, Sagar PK, Ansari SA. "A concise review on pharmacological applications of potent Unani drug: Mesua ferrea L. (Nagkesar)." Journal of Pharmacognosy and Phytochemistry. 2024;13(1):412–416. DOI: 10.22271/phyto.2024.v13.i1e.14860 — phytojournal.com
• "Nagakesara (Mesua ferrea Linn.): A critical review of ayurvedic literature and modern scientific evidence." GSC Biological and Pharmaceutical Sciences. 2026;34(03):217–232 — gscbps.gsconlinepress.com
• Sharma K et al. "A pilot study on haemostatic property of nagkesara in 1st and 2nd degree internal bleeding piles." World Journal of Pharmaceutical Research. 2017;6(9):815–823. DOI: 10.20959/wjpr20179-9262 — wisdomlib.org

Disclaimer

This article is for educational purposes only and is not medical advice. Herbal products can interact with medications and are not suitable for everyone. Talk to a qualified healthcare practitioner before use — especially if you are pregnant, breastfeeding, managing a medical condition, or taking prescription medicines.