Pumpkin Seed Oil
Also known as: PSO, Cucurbita pepo seed oil, pepita oil
Effective Dosage
360-3000 mg daily depending on use case (BPH: 720 mg/day; cardiovascular: 3 g/day)
What the Science Says
Pumpkin seed oil is a fatty oil pressed from the seeds of Cucurbita pepo. Small clinical trials suggest it may modestly reduce urinary symptoms in men with benign prostatic hyperplasia (BPH), though it works more slowly and less powerfully than the prescription drug tamsulosin. Early evidence also suggests it may support hair regrowth in women with pattern hair loss and may help lower blood pressure in postmenopausal women when taken at 3 g per day for 6 weeks. Most human studies are small and short-term, so results should be interpreted cautiously.
What It Doesn't Do
Not a replacement for prescription BPH medications — it works slower and less effectively than tamsulosin. No proven benefit for COVID-19 treatment (the squalene studies used an extracted compound, not the oil itself). No human evidence it treats liver disease or cancer. Animal studies showing liver protection and anti-cancer effects have not been tested in people. Won't regrow hair as reliably as minoxidil based on current data.
Evidence-Based Benefits
Pumpkin seed oil is a fatty oil pressed from the seeds of Cucurbita pepo. Small clinical trials suggest it may modestly reduce urinary symptoms in men with benign prostatic hyperplasia (BPH), though it works more slowly and less powerfully than the prescription drug tamsulosin. Early evidence also suggests it may support hair regrowth in women with pattern hair loss and may help lower blood pressure in postmenopausal women when taken at 3 g per day for 6 weeks. Most human studies are small and short-term, so results should be interpreted cautiously.
Weak EvidenceEffective at: 360-3000 mg daily depending on use case (BPH: 720 mg/day; cardiovascular: 3 g/day)
Source: auto-research
Absorption & Bioavailability
Unknown — no provided studies directly measured absorption or bioavailability of pumpkin seed oil in humans. Nanoemulsion formulations are being explored in lab settings to improve delivery.
Red Flags to Watch For
- Most supporting studies are very small (12–73 participants), limiting reliability of findings
- In vitro cell culture data shows dose-dependent toxicity to nasal epithelial cells at higher concentrations — high-dose or intranasal use needs more safety data
- Liver-protective and anti-cancer findings come entirely from rat studies and cannot be applied to humans yet
- Some products may contain squalene extracted from pumpkin seed oil — this is a different compound with separate (and unproven) claims
- BPH symptom relief was significantly slower than tamsulosin — do not substitute for medical treatment without consulting a doctor
Products Containing Pumpkin Seed Oil
See how Pumpkin Seed Oil is used in these analyzed products:
Research Sources
- PubMed
- NIH DSLD
This information is for educational purposes only and is not medical advice. Always consult a healthcare professional before starting any supplement regimen. Last updated: 2026-04-09