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This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always consult your healthcare provider before using herbs, especially if you are pregnant, nursing, taking medications, or have a medical condition.
How does Lagenaria siceraria support heart health?
Lagenaria siceraria, or bottle gourd, exhibits cardioprotective effects primarily through its antioxidant properties. The fruit contains bioactive compounds such as flavonoids, polyphenols, and sterols which help scavenge free radicals and reduce oxidative stress on cardiac tissues. Traditional Ayurvedic medicine suggests it acts as a mild diuretic, potentially helping manage blood pressure by promoting fluid excretion. While these mechanisms are supported by animal studies (Evidence Level C), robust human clinical trials confirming these specific pathways are limited. The combination of diuretic action and lipid-lowering potential contributes to its reputation in traditional cardiac care.
Does bottle gourd interact with blood pressure medication?
Yes, Lagenaria siceraria may interact with antihypertensive and diuretic medications. Because the herb possesses natural diuretic properties, taking it alongside prescription diuretics (such as hydrochlorothiazide or furosemide) could potentiate effects, leading to dehydration or excessively low blood pressure (hypotension). Patients managing cardiovascular conditions with pharmaceutical drugs should exercise caution and consult a healthcare provider before adding bottle gourd juice to their regimen. This interaction is theoretical based on pharmacology (Evidence Level D) rather than documented clinical case reports, but the risk of additive effects remains significant.
What is the recommended daily dosage of Lagenaria siceraria juice?
The standard recommended dosage for Lagenaria siceraria fresh juice is approximately 50 ml daily for adults. This amount is traditionally used to support cardiovascular health and act as a diuretic. It is crucial to ensure the juice is prepared from non-bitter varieties of the fruit, as bitter tastes indicate toxic cucurbitacins. Alternatively, cooked bottle gourd is widely consumed as a vegetable food source without a strict dosage limit, provided it is not bitter. Always taste a small amount before blending to check for bitterness, as toxic varieties can cause severe adverse effects.
Is bottle gourd safe to eat during pregnancy?
Lagenaria siceraria is generally considered unsafe during pregnancy and should be avoided in medicinal doses. While the cooked fruit is a common food, medicinal concentrates or juice pose risks due to the potential presence of toxic cucurbitacins, which can cause uterine contractions or gastrointestinal toxicity. The safety profile for pregnant women has not been established through clinical studies, and the risk of hepatotoxicity from bitter varieties outweighs potential benefits. Lactating women should also exercise caution. It is recommended to strictly avoid medicinal preparations of this herb during pregnancy.
Why is bitter bottle gourd toxic?
Bitter varieties of Lagenaria siceraria contain high concentrations of cucurbitacins, specifically cucurbitacin E, which are highly toxic compounds. Ingestion of these bitter compounds can cause severe gastrointestinal upset, including nausea, vomiting, diarrhea, and abdominal pain. In rare cases, it leads to hepatotoxicity (liver damage) and can be life-threatening. The bitterness serves as a natural warning sign; sweet varieties are safe for consumption. If the juice or cooked fruit tastes bitter, it should be discarded immediately. This toxicity is well-documented in toxicology reports regarding cucurbit poisoning.
PubMed-compiled information sheet
This sheet was compiled from PubMed (NIH) abstracts using AI assistance. Every factual claim is cited to a real PubMed article (see the source list). It has not yet been human-reviewed — confirm with a healthcare provider before use.
Compiled from 30 PubMed articles · model: gemma4:31b
Summary
Lagenaria siceraria, commonly known as bottle gourd, is an annual climber of the Cucurbitaceae family used as both a food source and a medicinal herb [PMID:36671470, PMID:36185670].
Background
Lagenaria siceraria is a pan-tropical domestic plant used for food, medicine, and utilitarian purposes [PMID:32818385, PMID:34218789]. It is an annual herbaceous plant that can also serve as rootstock for other cucurbit crops [PMID:39188545].
Traditional uses
Traditional medicine healers advocate its use for controlling diabetes mellitus, hypertension, liver diseases, and weight loss [PMID:26693268, PMID:22382183].
Active compounds
The plant contains a diverse set of biological compounds including flavonoids, sterols, saponins, terpenoids, triterpenoids, cucurbitacins, vitamins, minerals, proteins, and choline [PMID:36185670, PMID:34218789]. Specific identification of Cucurbitacin B has been noted [PMID:40796990, PMID:36618033].
Mechanism of action
Cucurbitacin B (CuB) has been shown to exert anti-inflammatory effects by regulating the assembly of the NLRP3 inflammasome and the activation of p-STAT3 via ZNF70, which reduces the release of pro-inflammatory cytokines such as IL-1β, IL-6, and TNF-α [PMID:40796990].
Clinical evidence
Evidence BDyslipidemia
Daily administration of 200 mL of fresh fruit extract for 90 days resulted in significant reductions in triglycerides, total cholesterol, body mass index, and blood pressure, while improving antioxidant markers (SOD, GSH, catalase) [PMID:24647091]
Evidence DExperimental Colitis (Animal Model)
Cucurbitacin B alleviated DSS-induced experimental colitis by targeting ZNF70 to suppress the NLRP3/STAT3 signaling axis [PMID:40796990]
Lagenaria siceraria showed a protective effect against adverse effects of betamethasone on liver and kidney function parameters in rats [PMID:41630747]
Safety & adverse effects
Ingestion of bitter bottle gourd juice can cause toxicity due to high concentrations of cucurbitacins [PMID:36618033, PMID:24360122]. Reported symptoms include severe abdominal pain, nausea, vomiting, diarrhea, hematemesis (upper gastrointestinal bleeding), and hypotension/shock [PMID:37492831, PMID:35871990, PMID:26693268, PMID:25653981]. These reactions can be rapid, occurring within 5 to 25 minutes of ingestion [PMID:24360122], and in some cases, have been fatal [PMID:22382183, PMID:25653981].
Evidence summary
Evidence consists primarily of case reports regarding toxicity (Cucurbitacin poisoning), a small-scale clinical study on dyslipidemia, and various in vitro or animal-based pharmacological studies. There is a lack of large-scale RCTs.
PubMed sources
1.PMID: 41329132 (2025) — Evolutionary Dynamics and Functional Diversification of bZIP Transcription Factors in Cucurbitaceae: A Pan-Genome Approach. · Journal of agricultural and food chemistry
2.PMID: 36671470 (2022) — Identification of Bottle Gourd (Lagenaria siceraria) OVATE Family Genes and Functional Characterization of LsOVATE1. · Biomolecules
4.PMID: 36185670 (2022) — Lagenaria siceraria fruit: A review of its phytochemistry, pharmacology, and promising traditional uses. · Frontiers in nutrition
5.PMID: 35871990 (2022) — Bottle Gourd (Lagenaria siceraria) Toxicity Diagnosed in the Emergency Department. · The Journal of emergency medicine
Government sources
No direct government monograph is available for this herb. The content below is AI-generated and has not been verified against an authoritative government source. Use the search links to check official sources before relying on this information.
6.PMID: 26693268 (2015) — Bottle gourd (Lagenaria siceraria) juice poisoning. · World journal of emergency medicine
7.PMID: 24360122 (2014) — Bitter bottle gourd (Lagenaria siceraria) toxicity. · The Journal of emergency medicine
8.PMID: 36832849 (2023) — How Does Lagenaria siceraria (Bottle Gourd) Metabolome Compare to Cucumis sativus (Cucumber) F. Cucurbitaceae? A Multiplex Approach of HR-UPLC/MS/MS and GC/MS Using Molecular Networking and Chemometrics. · Foods (Basel, Switzerland)
9.PMID: 34218789 (2021) — A Comprehensive Review on the Medicinal Importance; Biological and Therapeutic Efficacy of Lagenaria siceraria (Mol.) (Bottle Gourd) Standley Fruit. · Current topics in medicinal chemistry
10.PMID: 37576206 (2023) — Utilization of bottle gourd (Lagenaria siceraria (Mol.) Standl.) pomace for the preparation of instant kheer (dessert) mix. · Heliyon
11.PMID: 38068633 (2023) — Investigating Mineral Accumulation and Seed Vigor Potential in Bottle Gourd (Lagenaria siceraria) through Crossbreeding Timing. · Plants (Basel, Switzerland)
12.PMID: 36618033 (2023) — Novel detection method to rapidly quantify toxic cucurbitacin in Lagenaria siceraria (bottle gourd). · Journal of food science and technology
13.PMID: 40796990 (2025) — Cucurbitacin B alleviates DSS-induced experimental colitis by targeting ZNF70 to suppress the NLRP3/STAT3 signaling axis. · Inflammopharmacology
14.PMID: 32818385 (2020) — Molecular confirmation of varietal status in bottle gourd (Lagenaria siceraria) using genotyping-by-sequencing. · Genome
15.PMID: 36875578 (2023) — Forward genetic studies reveal LsAPRR2 as a key gene in regulating the green color of pericarp in bottle gourd (Lagenaria siceraria). · Frontiers in plant science
16.PMID: 39124272 (2024) — Combined BSA-Seq and RNA-Seq to Identify Potential Genes Regulating Fruit Size in Bottle Gourd (Lagenaria siceraria L.). · Plants (Basel, Switzerland)
17.PMID: 25653981 (2014) — Bottle gourd (Lagenaria siceraria) toxicity: a "bitter" diagnostic dilemma. · Journal of clinical and diagnostic research : JCDR
18.PMID: 26637422 (2016) — Biotechnology and pharmacological evaluation of Indian vegetable crop Lagenaria siceraria: an overview. · Applied microbiology and biotechnology
19.PMID: 36994387 (2023) — Chemical analysis of calabash chalk and its effect on locomotor activities and behavior in Swiss albino mice. · Heliyon
20.PMID: 39188545 (2024) — The de novo assembly and characterization of the complete mitochondrial genome of bottle gourd (Lagenaria siceraria) reveals the presence of homologous conformations produced by repeat-mediated recombination. · Frontiers in plant science
21.PMID: 36510478 (2023) — Efficacy and safety of endoscopic "calabash" ligation and resection for small gastric stromal tumors originating from the muscularis propria. · Cancer medicine
22.PMID: 41630747 (2025) — Protective effect of Spirulina and Lagenaria siceraria on betamethasone adverse effects in rats. · Open veterinary journal
24.PMID: 39473541 (2024) — Endoscopic "calabash" ligation and resection for small gastric mesenchymal tumors. · World journal of gastrointestinal endoscopy
25.PMID: 24647091 (2014) — Lipid-lowering and antioxidant functions of bottle gourd (Lagenaria siceraria) extract in human dyslipidemia. · Journal of evidence-based complementary & alternative medicine
26.PMID: 38623516 (2024) — Phytochemical composition of Lagenaria siceraria fruits from KwaZulu-Natal and Limpopo, South Africa. · Food chemistry: X
27.PMID: 41649682 (2025) — Efficacy of bottle gourd (Lagenaria siceraria) leaf extract in protecting against cabbage looper (Trichoplusia ni) (Lepidoptera: Noctuidae) infestation. · Crop health
28.PMID: 41737660 (2026) — Bottle Gourd (Lagenaria siceraria): Novel Insights Into the Biochemical Propensities of the Unexplored Cultivar. · Scientifica
29.PMID: 22382183 (2012) — Assessment of effects on health due to consumption of bitter bottle gourd (Lagenaria siceraria) juice. · The Indian journal of medical research