Kadali: Benefits, Evidence, Dosage & Safety

TL;DR

Kadali is banana (Musa paradisiaca), used in Ayurveda for urinary stones, diarrhea and bleeding disorders. A 71-patient study reported that pseudostem-core juice helped patients pass urinary stones: but it had no control group. Animal studies show reduced stone formation with stem juice and lower blood sugar with flower extracts. Banana as food is safe; medicinal-dose safety data are thin.

What it is

Kadali is Musa paradisiaca Linn., the banana/plantain plant of the Musaceae family, monographed in the Ayurvedic Pharmacopoeia of India (Part I, Vol. III) for its fruit and rhizome. Sanskrit synonyms include Mocha and Rambha, and the plant parts used in tradition span the root, rhizome, stem, leaves, fruit and flower (Ayurved Darpan, 2024).

Traditional use

A peer-reviewed review of kadali's Ayurvedic profile describes its rasa as tikta (bitter) and kashaya (astringent), guna as ruksha (dry), virya as sheeta (cold), with pitta-pacifying action. Its traditional indications (rogaghnata) include thirst (trut), bleeding disorders (raktapitta), eye diseases (netraroga), diabetes (prameha) and bloody diarrhea (raktatisara) (JDRAS review). Another Ayurvedic review credits kadali with sangrahi (binding, anti-diarrheal), mutrakricharahar (relieving urinary difficulty) and ashmarighna (alleviating urinary stones) actions (Ayurved Darpan, 2024). These are traditional claims, not clinical proof: the modern evidence is assessed separately below.

What modern research says

Urinary stones (one uncontrolled human study)

In 1995, an Indian urologist treated 71 patients diagnosed with urolithiasis (confirmed by X-ray and IVU) with juice of the core of the banana pseudostem, given as 600 mg tablets: half a tablet twice daily for the first two weeks for all patients, then one tablet twice daily in one group and up to two tablets three times daily in the other. After four weeks, 43 patients had passed stones of varying sizes, 4 had fewer stones, and 20 showed complete disappearance of stones (Gopakumara Pillai, Ancient Science of Life, 1995). There was no control group and no randomization, so the study cannot prove the juice caused the stone passage: but it is the only published human study and its results are consistent with the traditional ashmarighna claim.

Kidney-stone formation (animal studies)

In Wistar rats with ethylene-glycol-induced kidney stones, plantain stem juice (500 mg/kg) significantly reduced urinary calcium and oxalate excretion, cut calcium-oxalate crystal formation in kidney tissue, and lowered creatinine, urea and uric acid versus untreated stone-forming rats (Shivaraj et al., J. Pharmacol. Toxicol.). An earlier rat study found that stem-kernel juice (1.5 mL/rat/day) lowered the activity of oxalate-synthesizing enzymes and reduced stone-forming deposits in the kidneys (Kalpana Devi et al., via review). Animal evidence only: not proof of effect in people.

Blood sugar (animal studies)

Banana flower (Musa paradisiaca) powder at 2.5% and 5% of diet improved blood glucose, liver and kidney function and lipid profiles in alloxan-induced diabetic rats (El-Kholie & Mousa, Menoufia J. Agric. Sci.). Aqueous extracts of the banana inflorescence also showed hypoglycemic effects in streptozotocin-induced diabetic rats (review of M. paradisiaca pharmacology). All animal work: no human trials support banana flower for diabetes.

Gastric protection (animal study)

A natural flavonoid isolated from unripe plantain pulp protected the rat gastric mucosa from aspirin-induced erosions (Lewis & Shaw, J. Ethnopharmacol., 1999, via review). Preclinical only.

What the evidence does not support (yet)

No randomized controlled trial has tested kadali for urinary stones, diabetes or any other condition in humans. The single human stone study was uncontrolled, and everything else is animal work.

Dosage

No pharmacopoeial dose was identified. The published human study used 600 mg tablets of banana pseudostem core: half a tablet twice daily for the first two weeks, then, after two weeks, one group continued on one tablet twice daily while the other escalated to up to two tablets three times daily (Gopakumara Pillai, 1995). That was the protocol of one uncontrolled study, not a dosage recommendation: any medicinal use should be guided by a qualified practitioner.

Safety & contraindications

Banana fruit is an ordinary food with no identified toxicity signals. The 71-patient stone study's published abstract reports no adverse events, though it does not describe formal safety monitoring, so this is weak safety evidence (Gopakumara Pillai, 1995). One caution comes from ethnobotanical records: traditional midwives in Kerala have used fresh root/rhizome extract of banana varieties to induce abortion, so pregnant women should avoid medicinal preparations of the root and rhizome (folk-medicine survey, Ancient Science of Life, 1989). There are no clinical-trial safety data for medicinal doses of kadali preparations: safety data is limited, so talk to a clinician before medicinal use, especially in pregnancy.

FAQs

Can banana stem juice dissolve kidney stones?

Unproven. One uncontrolled study of 71 patients reported that many passed stones after two weeks of banana pseudostem-core juice, but with no control group the stones may have passed on their own (Gopakumara Pillai, 1995). Animal studies show reduced stone formation with stem juice (Shivaraj et al.). No RCT exists: see a urologist for stones.

Does banana flower help diabetes?

Only in rats. Banana flower powder improved glucose and lipid measures in diabetic rats, and inflorescence extracts were hypoglycemic in diabetic rat models (El-Kholie & Mousa; review). No human trial supports banana flower for blood sugar control.

Which part of the banana plant is used medicinally?

The API monographs the fruit and rhizome (Ayurvedic Pharmacopoeia of India, Part I, Vol. III); traditional and folk use also covers the stem/pseudostem core (for urinary stones), leaves, root and flower (Ayurved Darpan, 2024).

What dose did the human stone study use?

600 mg tablets of banana pseudostem core: half a tablet twice daily for the first two weeks, then, after two weeks, one group took one tablet twice daily while the other took up to two tablets three times daily (Gopakumara Pillai, 1995). That was one uncontrolled study's protocol, not a recommendation.

Is kadali safe?

As food, yes: banana is an ordinary fruit. For medicinal preparations (stem juice, root/rhizome extracts), human safety data are essentially absent, so safety data is limited: talk to a clinician before medicinal use.

Is kadali safe in pregnancy?

Eating banana fruit is normal food. But folk records describe banana root/rhizome extract being used to induce abortion in Kerala, so pregnant women should avoid medicinal root/rhizome preparations (Ancient Science of Life, 1989). No clinical safety data exist for medicinal doses in pregnancy.

Sources

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.