Quick Summary
Pumpkin seed (Cucurbita pepo) is traditionally used for managing benign prostatic hyperplasia (BPH) symptoms and hair loss. Some clinical evidence suggests benefits in these areas. It has also been studied for its nutritional and phytochemical properties. Clinical studies indicate it is generally well-tolerated with minimal adverse effects.
What Is It?
Pumpkin seed refers to the edible seeds of the pumpkin plant, scientifically known as Cucurbita pepo. These seeds are commonly consumed as snacks, used in cooking, or extracted for oil. They contain various bioactive compounds that contribute to their nutritional value and potential health-related effects.
Traditional Uses
Traditionally, pumpkin seeds have been used to support urinary health, particularly for symptoms associated with benign prostatic hyperplasia (BPH). They are also used in herbal formulations and dietary supplements aimed at reducing hair loss, including conditions like androgenetic alopecia and telogen effluvium.
Active Compounds
Pumpkin seeds contain a variety of bioactive compounds such as amino acids, lipids, phytosterols, antioxidants, and other phytochemicals. Metabolomic profiling studies highlight the diversity of these compounds, which may contribute to their nutritional and potential health-promoting properties.
Potential Benefits with Evidence Levels
- Improvement of benign prostatic hyperplasia (BPH) symptoms – Moderate evidence
Clinical trials show pumpkin seed oil may relieve BPH symptoms with good tolerability, although it appears less effective than pharmaceutical treatment like tamsulosin. Systematic reviews suggest modest benefits but recommend more research for conclusive evidence.
(Zerafatjou et al. 2021, PMID:34666728; Csikós et al. 2021, PMID:34885733; Antoniou et al. 2023, PMID:36902686)
- Improvement of hair loss, including androgenetic alopecia and telogen effluvium – Low to moderate evidence
Emerging studies and meta-analyses indicate pumpkin seed oil may improve hair density and reduce shedding with good tolerability. However, reviews note limitations such as small sample sizes and short study durations.
(Zhou et al. 2025, PMID:41561175; Sáez Moya et al. 2025, PMID:41375774; Ahmed et al. 2024, PMID:40771449)
- Nutritional and phytochemical profile with potential health benefits – Preclinical and analytical studies
Chemical analyses describe pumpkin seed extracts’ rich composition, including amino acids and lipids that contribute to their nutritional value. These findings suggest potential health-promoting effects, with the need for further human clinical trials to confirm benefits.
(Grasu et al. 2025, PMID:40805657; another study PMID:40232096)
Side Effects
Pumpkin seed and its extracts are generally well tolerated. Clinical trials report minimal to no adverse effects, with one randomized controlled trial noting no side effects compared to mild side effects in the pharmaceutical comparator group. Animal studies show low acute and sub-chronic toxicity, with no significant organ damage observed.
Drug Interactions
No specific data are available regarding drug interactions with pumpkin seed. Given its use as a phytotherapeutic agent, cautious use with other medications is advisable until further studies clarify potential interactions.
Who Should Avoid It
No formal contraindications have been identified. However, caution is recommended for individuals with known allergies to pumpkin or related Cucurbita species. People with unknown sensitivity to phytotherapies should also exercise caution.
Pregnancy and Breastfeeding
There is no direct evidence on the safety of pumpkin seed use during pregnancy or breastfeeding. Due to limited data, use during these periods should be approached with caution and under medical supervision.
Evidence Limitations
Current clinical evidence is constrained by small sample sizes, short follow-up periods, and heterogeneous study designs. Most studies focus on symptomatic relief rather than long-term outcomes. Further well-powered, placebo-controlled randomized trials are needed. There is a lack of pharmacokinetic data, standardized extract formulations, and comprehensive adverse event reporting. Additionally, data on drug interactions and safety in pregnancy are insufficient.
References
- Zerafatjou N, Amirzargar M, et al. (2021) Pumpkin seed oil (Cucurbita pepo) versus tamsulosin for benign prostatic hyperplasia symptom relief: a single-blind randomized clinical trial. DOI: 10.1186/s12894-021-00910-8
- Zhou L, Zhu W, Chen Y. (2025) A systematic review and network meta-analysis on dietary supplements for androgenetic alopecia: effects and safety. DOI: 10.3389/fnut.2025.1719711
- Sáez Moya M, Westgate GE, Paus R, Grohmann D. (2025) A Novel, Drinkable Food Supplement Formulation Reduces Hair Shedding and Increases the Percentage of Anagen Scalp Hair Follicles in Females with Hair Loss. DOI: 10.3390/jcm14238471
- Csikós E, Horváth A, et al. (2021) Ethnopharmacological and clinical overview of pumpkin seed (Cucurbita pepo) for benign prostatic hyperplasia treatment. DOI: 10.3390/molecules26237141
- Antoniou V, Gauhar V, et al. (2023) Phytotherapies for benign prostatic hyperplasia: a systematic review. DOI: 10.3390/jcm12051899
- Zhang H, Zhou Y, et al. (2024) Toxicity assessment of Cucurbita pepo cv Dayangua and its effects on gut microbiota in mice. DOI: 10.1186/s12906-024-04551-w
- Ahmed A, Alali AM, et al. (2025) Herbal Remedies for Hair Loss: A Review of Efficacy and Safety. DOI: 10.1159/000542876
- Grasu AE, Senn R, et al. (2025) Profiling Hydrophilic Cucurbita pepo Seed Extracts: A Study of European Cultivar Variability. DOI: 10.3390/plants14152308
Last Reviewed
June 2025
Disclaimer: This herb database page is for informational purposes only and does not constitute medical advice. Always consult a qualified healthcare professional before starting any new supplement or treatment, especially if you have existing health conditions or are taking medications.