Pumpkin Seed OilFat

• Benign prostatic hyperplasia and urinary symptomsPossibly helps

  The largest test is the year-long, placebo-controlled GRANU trial in 1,431 men aged 50–80, which used whole pumpkin seed rather than the oil [2].
  
  Its responder rate — an IPSS drop of at least 5 points — was 58.5% with pumpkin seed against 47.3% with placebo, which the authors called only 'descriptively' significant [2].
  
  A single-blind RCT of 73 men used the oil at 360 mg twice daily for 3 months. Symptoms fell, but less than with tamsulosin, and with fewer side effects [3]. ^[2]

• Why the BPH numbers disagreePossibly helps

  Trial results are not consistent in strength. GRANU's placebo-controlled effect was only descriptively significant [2].
  
  An earlier trial of about 2,245 patients, at 500–1,000 mg/day for 12 weeks, reported a 41.4% drop in IPSS, with over 96% reporting no side effects [1].
  
  Differing trial size, duration, and Cucurbita species may explain the gap. We are flagging the disagreement rather than picking a winner [3]. ^[1]

• Hair count in men with androgenetic alopeciaPossibly helps

  A randomized, double-blind, placebo-controlled trial gave 76 men with mild-to-moderate androgenetic alopecia 400 mg/day of the oil, by mouth, for 24 weeks [9].
  
  Hair count rose 40% in the oil group against 10% on placebo (p<0.001), with higher self-rated improvement and satisfaction scores [1][9].
  
  That is one trial, in men only, using oral capsules. It is not a scalp-application result and is not replicated elsewhere in these sources. ^[9]

• Hair-shaft diversity in women, against topical minoxidilPossibly helps

  A separate small trial in women with female-pattern hair loss reported pumpkin seed oil performing comparably to 5% topical minoxidil on hair-shaft diversity over 3 months [7].
  
  The source does not state which route the pumpkin seed oil arm used. Read it as a comparison of unclear design rather than support for a particular product. ^[7]

• Overactive bladderPossibly helps

  A Japanese trial used 10 g/day of Cucurbita maxima oil for 12 weeks and reported improvement in urinary frequency and urgency [1][6].
  
  That is roughly ten times the dose used in the BPH oil trials. A US pilot testing 1,000 mg/day of Cucurbita pepo extract in women is still running, with nothing published yet [4]. ^[1]

• Blood lipids and blood pressurePossibly helps

  In postmenopausal women, 3 g/day improved arterial stiffness and blood-vessel function [6].
  
  Among 127 people with dyslipidemia, hypertension, diabetes, or obesity, 1,000 mg/day alongside diet and lifestyle guidance lowered LDL cholesterol and diastolic blood pressure and raised HDL [7].
  
  The comparison group got the guidance alone. Both are single studies of surrogate markers, not of heart attacks or strokes [6][7]. ^[7]

• Menopause symptomsPossibly helps

  A 2011 pilot study used 2,000 mg/day for 12 weeks and reported fewer headaches, hot flashes, and joint aches than a wheat-germ-oil control [7].
  
  It was small, and no source here reports a replication. ^[7]

• Mood and depressionPossibly helps

  Rat models of stress-induced depression report antidepressant-like effects, described as comparable to the drug venlafaxine [1][7].
  
  No human clinical trial data was identified. Rodent behavioural models do not carry across to people, so nothing here speaks to oral use for mood [1][7]. ^[1]

• Eczema and acne, applied to the skinPossibly helps

  Topical studies suggest possible benefit in eczema — better than a plain moisturizing cream, though weaker than a topical steroid — and some effect on acne severity [7][8].
  
  These are skin-application findings and say nothing about swallowing capsules. No human RCT backs either use [1][8]. ^[7]

• Virgin, cold-pressed oilAnyone who wants the phytochemical fraction, not just the fat.

  Elemental content

  Unrefined. Oleic 43.8%, linoleic 33.1%, palmitic 13.4%, stearic 7.8% — together about 98% of total fatty acids [1].

  Absorption

  Retains more carotenoids, tocopherols, and phytosterols than refined oil, since no heat or chemical processing is involved [1].
  
  In a mouse model of fatty liver and atherosclerosis, virgin oil outdid refined oil on liver steatosis, inflammation, and lesion area [1].

  Best for

  Anyone who wants the phytochemical fraction, not just the fat.
  
  Both virgin and refined oil improved blood lipids against a Western-type control diet in that same mouse model [1].

• Refined oilCheaper culinary use. It still improved blood lipids in the mouse comparison, just less than virgin oil did .

  Elemental content

  Same four dominant fatty acids, produced using heat and/or chemical processing [1].

  Absorption

  Processing strips out part of the carotenoid, tocopherol, and phytosterol content that survives cold-pressing [1].

  Best for

  Cheaper culinary use. It still improved blood lipids in the mouse comparison, just less than virgin oil did [1].

• Capsules and softgelsMatching a trial dose. Check the label against the dose actually used for the outcome you care about — those differ by…

  Elemental content

  Typically 1,000–2,000 mg of oil per serving [5][8].

  Absorption

  That sits at the lower-to-middle end of what has been studied, a range running from 320 mg/day up to 10 g/day [5][6][8].

  Best for

  Matching a trial dose.
  
  Check the label against the dose actually used for the outcome you care about — those differ by more than 30-fold [5][6][8].

• Whole pumpkin seed, not the oilReading the BPH literature accurately.

  Elemental content

  Dry seeds are about 47% oil by weight [1].

  Absorption

  GRANU dosed 5 g of whole seed twice daily for 12 months, alongside a separate 500 mg extract-capsule arm [2].

  Best for

  Reading the BPH literature accurately.
  
  A whole-seed result is not evidence for an oil capsule, and GRANU is the largest trial in this area [2].

• Topical scalp and skin productsNothing that has oral-trial backing behind it.

  Elemental content

  Pumpkin seed oil as a cosmetic ingredient, with the concentration usually unstated [5][8].

  Absorption

  Usually applied to the scalp a few times a week, left on for 20–30 minutes or overnight, then washed out [5][8].

  Best for

  Nothing that has oral-trial backing behind it.
  
  The 24-week hair-count trial used oral 400 mg/day capsules, not scalp application [9].

• Cucurbita species vary between productsUnderstanding why trial results are hard to line up against each other .

  Elemental content

  Oil may come from C. pepo, C. maxima, or C. moschata, and labels often do not say which [1].

  Absorption

  The overactive-bladder trial used C. maxima oil at 10 g/day; the US pilot uses C. pepo extract at 1,000 mg/day [1][4][6].

  Best for

  Understanding why trial results are hard to line up against each other [1].

• Digestive upset

  Bloating, loose stools, and nausea can occur, most often at high doses or on an empty stomach [6][8]. ^[6]

• Allergic reactions

  Uncommon but documented: itching, hives or rash, and skin irritation in people sensitive to pumpkin or to seeds generally [5][6][8]. ^[5]

• Overall tolerability

  In the large BPH trial, over 96% of patients reported no undesired side effects [1].
  
  GRANU described its study products as well tolerated across 12 months, and the oil caused fewer side effects than tamsulosin head-to-head [2][3]. ^[1]

• Pregnancy — no data in either direction

  None of the clinical trials reviewed here enrolled pregnant participants, and no dedicated pregnancy-safety data for concentrated supplements was found [7][8].
  
  That is an absence of evidence, not a finding of harm and not a clearance. ^[7]

• Blood-pressure drugs — captopril and felodipine

  In hypertensive rats, pumpkin seed oil increased the blood-pressure-lowering effect of captopril and felodipine [7].
  
  That is an animal finding, with no confirmed human interaction data behind it. General medical guidance is still to check with a doctor before combining it with blood-pressure medication [7]. ^[7]

• The animal signal and the human data point different ways

  The only identified drug interaction comes from that single rat study [7].
  
  Meanwhile the human BPH trials — older adults, many of them on other medications — describe it as very well tolerated, with no significant drug-related adverse events [1][2][3].
  
  Those two facts sit side by side, unresolved. ^[7]

Pumpkin seed oil is the product itself rather than a nutrient spread across foods, so the real question is where the oil comes from.

It is cold-pressed or refined from the seeds of Cucurbita pepo, C. maxima, and C. moschata, which are roughly 47% oil by dry weight [1].

One tablespoon (about 15 mL) runs 120–130 kcal and about 14 g of fat, essentially all unsaturated and cholesterol-free, plus polyphenols and carotenoids [5][7][8].

The fat breakdown is disputed. Health.com lists roughly 7.5 g polyunsaturated / 6 g monounsaturated / 1.5 g saturated; EverydayHealth lists 9 g / 2.5 g / 2.5 g for the same serving [7][8].

Both agree on ~14 g total fat and 0 g cholesterol. The gap likely reflects different tested products, species, or lab methods rather than one figure being simply wrong [7][8].

No source reviewed compares morning against evening, or fasted against fed, for pumpkin seed oil.

What the trials share is a split, twice-daily schedule rather than one large dose. GRANU used 5 g of seed or a 500 mg capsule twice daily [2].

The oil-versus-tamsulosin trial used 360 mg twice daily [3]. Taking an oil-based supplement with a meal is common practice, but that timing has not been tested here specifically.