Medinsight
Mar 20, 2026

Why Pumpkin Seeds May Help

BPH affects many men over 50, leading to lower urinary tract symptoms (LUTS) such as weak urine flow, incomplete emptying, and bladder irritation. Overactive bladder can cause similar problems in both men and women.

Scientific research points to several ways pumpkin seeds and their oil may offer relief:

  • Rich in zinc and phytosterols: The prostate gland naturally contains high levels of zinc, which supports its function. Pumpkin seeds provide a good dietary source of this mineral. Phytosterols (plant compounds) may help inhibit the enzyme 5-alpha-reductase, which converts testosterone to dihydrotestosterone (DHT)—a hormone linked to prostate enlargement.

  • Anti-inflammatory and muscle-relaxing effects: Compounds in the seeds and oil may reduce inflammation and relax bladder and urethral muscles, easing urgency and frequency.

  • Antioxidant benefits: These help combat oxidative stress, which can contribute to prostate issues.

What the Studies Show

Multiple clinical trials and reviews support modest but meaningful benefits, particularly for symptom relief rather than shrinking the prostate itself.

  • In the large GRANU study (over 1,400 men with BPH/LUTS), participants taking 5 grams of pumpkin seeds twice daily for 12 months experienced a clinically relevant reduction in International Prostate Symptom Score (IPSS)—a standard measure of urinary symptoms—compared to placebo. About 58.5% responded positively versus 47.3% on placebo.

  • A 2019 pilot study using an oil-free hydroethanolic pumpkin seed extract (taken once daily) reported an average 30% drop in IPSS after 12 weeks, along with less nocturia and reduced post-void residual urine volume.

  • Smaller trials on pumpkin seed oil (often 320–1,000 mg daily) showed improvements in overactive bladder symptoms, including reduced daytime/nighttime frequency, urgency, and incontinence—benefits seen in both men and women after 6–12 weeks.

  • A 2021 comparison found pumpkin seed oil relieved BPH symptoms with fewer side effects than some prescription options like tamsulosin, though it wasn’t as potent overall.

  • Meta-analyses of long-term trials suggest pumpkin seed extracts provide symptomatic relief for mild-to-moderate BPH, with better quality-of-life scores and no major safety concerns.

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