Patola Patra: Benefits, Evidence & Safety

TL;DR

Patola-patra is the leaf of Trichosanthes dioica (pointed gourd), used in Ayurveda for digestive and skin complaints. In rats, an aqueous leaf extract lowered blood glucose significantly (a 2008 animal study), and a small observational report noted improvement in duodenal ulcer cases. No human trials of the leaf have been published, so clinical benefit is unproven.

(56 words. Sources: Kumar et al., PMC 2012 review; Rai et al., Pharmaceutical Biology 2008.)

What it is

Patola-patra is the leaf of Trichosanthes dioica Roxb. (family Cucurbitaceae), the pointed gourd: a climbing vegetable plant widely cultivated in the Indian subcontinent and used both as food and medicine (Kumar et al., Pharmacognosy Reviews 2012). Its bioactive constituents identified across plant parts include trichosanthin, cucurbitacin B, flavonoids, sterols and triterpenoids such as lupeol and betulin (same review). In Ayurvedic nomenclature, patola denotes this species, and the leaf (patra) is the part covered here.

Traditional use

Ethnomedical surveys record Trichosanthes dioica as traditionally used for gastrointestinal disorders, skin infections and fever (Kumar et al., 2012). The same review cites a small observational report in which patola showed a 45% "excellent response" rate in 20 cases of duodenal ulcer: an uncontrolled observation, not a trial. These are traditional and observational uses; the section below assesses controlled research.

What modern research says

Blood-sugar lowering in diabetic rats (animal study)

Rai et al. (2008) gave aqueous leaf extract of Trichosanthes dioica at 250, 500 and 750 mg/kg body weight orally to normal rats and to streptozotocin-induced sub-diabetic and mildly diabetic rats: the 500 mg/kg dose was the most effective, lowering fasting blood glucose by 32.9% at 6 hours in normal rats (p < 0.001), and by 40.3% and 88.6% at 3 hours in sub- and mildly diabetic rats during glucose tolerance testing (Rai et al., Pharmaceutical Biology 2008, 46(12):894–899). A 2025 narrative review of the plant's antidiabetic evidence summarizes that aqueous fruit and leaf extracts improved fasting glucose, glucose tolerance, glycated hemoglobin and lipid profiles in animal models, attributing effects to flavonoids, cucurbitacins, triterpenoids and sterols (Parthasarathy & Bhalla, African Journal of Biomedical Research 2025). Animal findings do not establish effects in humans.

Other preclinical activities

The 2012 review catalogues additional laboratory and animal findings for the plant: antioxidant, hepatoprotective, anti-inflammatory, immunomodulatory, wound-healing, antipyretic and cytotoxic activities: with the explicit conclusion that systematic standardization, mechanistic studies and clinical trials are still needed (Kumar et al., 2012). None of these has been tested in a human trial of patola leaf.

No human trials

We located no randomized controlled trial, and no published human study, of patola leaf for diabetes, ulcers, or any other indication. In plain terms: the animal evidence on blood sugar is consistent but preliminary, and clinical benefit in people is unproven.

Safety & contraindications

Animal work reported no toxic effect at the doses tested during LD50 assessment (per the 2012 review), but human safety data for patola leaf are lacking. Because animal studies show blood-glucose lowering, people with diabetes who take glucose-lowering medicines should be cautious about combining them with patola preparations until human data exist: a general caution, not a trial finding. Safety data is limited: talk to a clinician before use, especially if you are pregnant, breastfeeding, managing a medical condition, or taking prescription medicines.

FAQs

What is patola patra?

Patola-patra is the leaf of Trichosanthes dioica (pointed gourd, family Cucurbitaceae), a climbing plant used as both vegetable and medicine in India. In Ayurveda, patola denotes this species; the leaf contains flavonoids, cucurbitacins, sterols and triterpenoids (Kumar et al., 2012).

Does patola leaf lower blood sugar?

In rats, yes: an aqueous leaf extract at 500 mg/kg lowered fasting blood glucose by about a third and markedly improved glucose tolerance in diabetic rats (Rai et al., 2008). But no human study has tested it, so whether it lowers blood sugar in people is unknown. Animal results are not clinical proof.

Is it used for ulcers?

A small observational report cited in a 2012 review noted a 45% "excellent response" in 20 duodenal ulcer cases given patola: but this was uncontrolled and tiny, and no trial has followed it up (Kumar et al., 2012). Evidence is inadequate.

Is patola leaf safe?

Animal toxicity testing reported no toxic effect at tested doses, but there are no human safety studies. Given the animal blood-sugar findings, people on diabetes medication should be cautious. Safety data is limited: talk to a clinician before use.

Sources

Disclaimer

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