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PSO6.5
Pumpkin Seed Oil Research
Mostly mechanism / observationalLimited safety
10 peer-reviewed studies
What the evidence says
Mostly mechanism / observational
Most Pumpkin Seed Oil studies are mechanism or observational rather than RCTs that measure a clinical effect — keep findings provisional.
Most evidence is from high-quality meta-analyses and randomised trials published 2011–2024 with a typical study size of 76 participants.
Based on 10 studies · 1 meta-analysis · 5 RCTs · 927 total participants
Confidence
Moderate
By outcome
BPH & lower urinary tract symptoms
Mostly mechanism / observational5 studies
Safety profile
Mostly mechanism / observational5 studies
Women's healthImproved HDL cholesterol and arterial hemodynamics in postmenopausal women · 6-12 weeks · Modulation of DHT levels and androgen-sensitive tissues via phytosterol activity · 8-12 weeks
Mostly mechanism / observational3 studies
Men's vitalityReduced DHT-mediated effects via 5-alpha reductase inhibition, supporting prostate and hair health · 8-12 weeks · BPH symptom relief and urinary support · 6-12 weeks
Mostly mechanism / observational3 studies
Hair & nails
Too few graded studies2 studies
Heart & blood pressureModest reductions in systolic blood pressure and arterial stiffness in postmenopausal women · 6-8 weeks
Too few graded studies2 studies
Cholesterol & lipidsModest reductions in systolic blood pressure and arterial stiffness in postmenopausal women · 6-8 weeks
Too few graded studies1 study
Immune support
Too few graded studies1 study
Active research area
7 studies in the last 5 years · Latest meta-analysis: 2024
201120172024
1Systematic Review2022
Clinical studies have shown that pumpkin seed oil may be beneficial in the treatment of cardiovascular problems of menopausal women and ailments associated with imbalance of sex hormones.
Šamec D et al. · Comprehensive reviews in food science and food safety (2022)
We provide a comprehensive overview of pumpkin seed oil chemical composition, phytochemical content, biological activity, and safety, as well as the overview of production processes and contemporary use.
The main phytochemicals in pumpkin seed oil with health-related properties are polyphenols, phytoestrogens, and fatty acids, but carotenoids, squalene, tocopherols, and minerals may also contribute to health benefits.
Most studies have been conducted in vitro and support the claim that pumpkin seed oil has antioxidant and antimicrobial activities.
Studies of nutritional interventions with the highest-quality evidence showed the potential benefit of pumpkin seed oil for the treatment of hair loss.
Drake L et al. · JAMA Dermatology (2023)
30 articles were included comprising 17 RCTs, 11 clinical studies, and 2 case series in individuals without known nutritional deficiency
Pumpkin seed oil was among the nutritional interventions with highest-quality evidence for hair loss treatment
Adverse effects were rare and mild for all nutritional therapies evaluated including pumpkin seed oil
The review proposes and endorses careful utilization of conventional medications that may be investigated further to discover possible PDE-5, 5 alpha-reductase, an alpha-blocker inhibitor for managing BPH.
Krishnamoorthi R et al. · Journal of ethnopharmacology (2024)
The review proposes and endorses careful utilization of conventional medications that may be investigated further to discover possible PDE-5, 5 alpha-reductase, an alpha-blocker inhibitor for managing BPH.
Even though most conventional formulations, such as 5 alpha-reductase, are readily available, systemic assessment of the effectiveness and mechanism of action of the herbal constituents is still necessary to identify novel chemical moieties that can be further developed for maximum efficacy.
However, there exist abundant botanicals and medicinal plants across several regions of Africa, Asia, and the Americas, which can be further studied and developed for utilization as a potential phytotherapeutic for the management of BPH.
An updated meta-analysis consolidating the evidence base for pumpkin seed oil in BPH-related LUTS, directly relevant to the supplement's primary clinical indication.
Vahabi S et al. · Journal of Ethnopharmacology (2024)
Pumpkin seed oil significantly reduced IPSS scores compared to placebo across included trials
Peak urinary flow rate improved meaningfully in pumpkin seed oil groups
Adverse event profiles were comparable to placebo, supporting safety
8Augmentation index reductionRCTCited 6×n=23 · very small study2019
PSO improved arterial hemodynamics in postmenopausal women and therefore might be effective in the prevention and treatment of hypertension in this population.
Wong A et al. · Complementary Therapies in Clinical Practice (2019)
Borderline
Augmentation index (AIx), brachial and central systolic blood pressure significantly decreased following PSO (3 g/day for 6 weeks) but not placebo (P<0.05)
Arterial stiffness index (SI) and heart rate variability parameters remained unchanged in both PSO and placebo groups
PSO supplementation improved arterial wave reflection and reduced central hemodynamic load in postmenopausal women with elevated blood pressure
Pumpkin seed oil was an effective and well-tolerated treatment for symptomatic benign prostatic hyperplasia with a favorable side effect profile compared to prazosin.
Shirvan MK et al. · JPMA: The Journal of the Pakistan Medical Association (2014)
Pumpkin seed oil (prostafit) demonstrated significant improvements in IPSS scores in men with symptomatic BPH
PSO was compared directly to prazosin (alpha-blocker) in a randomized trial design
PSO group experienced fewer adverse effects compared to the prazosin group
10PilotCited 20×n=35 · small study2011
Pumpkin seed oil supplementation significantly improved HDL cholesterol in postmenopausal women in this pilot randomized controlled trial.
Gossell-Williams M et al. · Climacteric: The Journal of the International Menopause Society (2011)
Postmenopausal women supplemented with PSO showed significant increases in HDL cholesterol compared to wheat germ oil control
PSO group also demonstrated reductions in diastolic blood pressure and menopausal symptom severity
No significant changes in total cholesterol, LDL, or triglycerides were observed in the PSO group