Hermetica Superfood Encyclopedia
Legacy index-continuity record: the score and narrative are provisional and must not be represented as validated or human-approved.
Review flags: AWAITING_SEMANTIC_VALIDATION
Pattypan squash (Cucurbita pepo) seeds contain phytosterols, particularly beta-sitosterol, which inhibit 5-alpha-reductase enzyme activity. This mechanism helps reduce prostate enlargement and improve urinary flow in men with benign prostatic hyperplasia.
Origin & History
Cucurbita pepo, a species including pattypan squash and pumpkin, is native to the Americas and cultivated globally. The supplement is primarily sourced from its seeds, from which oil or extracts are produced via cold-pressing or solvent extraction. It is classified as a phytotherapeutic agent rich in lipids and phytosterols.
Research Narrative (Provisional)
A 2016 narrative review (PMID: 27377091) found that clinical studies consistently reported improvements in BPH symptoms. A single-blind RCT showed 720 mg/day of pumpkin seed oil significantly reduced IPSS scores and prostate volume over 3 months, while a 24-month noninterventional study (PMID: 35622117) demonstrated sustained benefits for BPH without impacting sexual function.
Preparation & Dosage
Dosage guidance is withheld because the publication gate has not recorded adequate support for this profile.
Nutritional Profile
Pattypan squash (Cucurbita pepo) is a low-calorie vegetable-fruit (~18-20 kcal/100g raw) with high water content (~94%). Macronutrients per 100g: carbohydrates ~4.3g (of which sugars ~1.7g), dietary fiber ~1.3-1.5g (pectin and hemicellulose fractions), protein ~1.2g, fat ~0.2g. Micronutrients per 100g: Vitamin C ~17-19mg (~20% DV), Folate (B9) ~29-33µg (~8% DV), Vitamin B6 ~0.12mg, Niacin (B3) ~0.5mg, Riboflavin (B2) ~0.04mg, Potassium ~262mg (~6% DV), Magnesium ~25mg (~6% DV), Phosphorus ~38mg, Calcium ~25mg, Iron ~0.6mg, Zinc ~0.3mg, Manganese ~0.18mg. Bioactive compounds: Cucurbitacins (trace tetracyclic triterpenoids with anti-inflammatory properties), beta-carotene and lutein/zeaxanthin (~300-450µg carotenoids per 100g, concentrated in the skin), phytosterols including beta-sitosterol (~3-5mg/100g fresh weight, higher in seeds — relevant to BPH benefits), cucurbitin (a unique amino acid in seeds), polyphenols including hydroxycinnamic acids and flavonoids (~40-60mg GAE/100g). Seed oil contains linoleic acid (~45-60% of fatty acids) and oleic acid (~20-30%). Fiber bioavailability: soluble pectin fractions support gut fermentation; carotenoid bioavailability is enhanced by co-consumption with dietary fats. Beta-sitosterol bioavailability from whole fruit is moderate (~5-10% absorption), higher from concentrated seed extracts used in clinical BPH studies.
Reported Mechanism (Provisional)
The phytosterols in pattypan squash seeds, primarily beta-sitosterol and campesterol, competitively inhibit 5-alpha-reductase enzymes that convert testosterone to dihydrotestosterone (DHT). This reduces DHT accumulation in prostate tissue, decreasing inflammation and cellular proliferation. Additionally, these compounds may modulate prostaglandin synthesis and reduce inflammatory cytokine production in the prostate.
Clinical Narrative (Provisional)
Clinical evidence for pattypan squash extract comes primarily from studies on Cucurbita pepo seed preparations. A randomized controlled trial showed significant improvements in International Prostate Symptom Score (IPSS) and uroflowmetry parameters in men with BPH. Narrative reviews report moderate evidence for symptom relief, though most studies have small sample sizes of 50-100 participants. The evidence base is considered moderate quality but requires larger, longer-term studies for definitive conclusions.
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