Cosmeceutical (Oral) · Other

Pumpkin Seed Oil (Hair Loss)

Provisional Moderate Scorebotanical

Hermetica Superfood Encyclopedia

Published March 18, 2026Last updated March 18, 2026Methodology · Editorial policy · Report an error

Evidence review status: unreviewed

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

Provisional Summary

Pumpkin seed oil contains delta-7-stearine and other phytosterols that inhibit 5-alpha-reductase enzyme, reducing DHT production linked to male pattern baldness. Clinical studies show it can increase hair count by 30-40% over 24 weeks when taken as a supplement.

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Screened PMID Records

Reported Benefits

Pending

Synergy Review

At a Glance

CategoryCosmeceutical (Oral)

GroupOther

Public Score StatusProvisional Moderate

Primary Keywordpumpkin seed oil hair loss

Pumpkin Seed Oil close-up macro showing natural texture and detail — rich in dht inhibitor, anti-inflammatory, antioxidant

Pumpkin Seed Oil (Hair Loss) — botanical close-up

Reported Benefits (Provisional)

Pumpkin Seed Oil inhibits 5-alpha-reductase, reducing DHT and promoting hair regrowth. This action is crucial for combating androgenetic alopecia. - It is rich in phytosterols, which improve hair thickness and density by enhancing scalp circulation. Better circulation ensures nutrient delivery to hair follicles. - The oil's high zinc content supports keratin production, strengthening hair strands. Stronger hair is less prone to breakage and split ends. - Antioxidants in the oil protect against oxidative stress, preserving hair color and vitality. This protection can delay the onset of graying. - It has anti-inflammatory properties that soothe the scalp, reducing itchiness and flakiness. A calm scalp environment is essential for healthy hair growth. - Pumpkin Seed Oil is a rich source of omega fatty acids, which hydrate and nourish the scalp. This hydration prevents dryness and promotes a healthy scalp microbiome. - It may improve cholesterol levels, supporting cardiovascular health, which indirectly benefits hair by enhancing blood flow to the scalp.

Origin & History

Natural habitat

Pumpkin seed oil is derived from the seeds of the pumpkin, a plant native to North America. The oil is extracted through cold pressing, preserving its rich nutrient profile.

“Pumpkin seeds have been used for centuries in traditional medicine across various cultures for their health benefits, including prostate health and hair growth.”Traditional Medicine

Research Narrative (Provisional)

Some studies, including RCTs, suggest that pumpkin seed oil may help reduce hair loss by blocking DHT production. However, further research is needed to establish its efficacy conclusively.

Preparation & Dosage

Dosage guidance is withheld because the publication gate has not recorded adequate support for this profile.

Nutritional Profile

Pumpkin Seed Oil is predominantly composed of unsaturated fatty acids: oleic acid (omega-9, ~34-42%), linoleic acid (omega-6, ~42-57%), with minor palmitic and stearic acid fractions. Bioactive compounds critical for hair loss applications include delta-7-sterols (notably delta-7-sterol and spinasterol, ~100-200mg per 100g), which are the primary 5-alpha-reductase inhibitors. Zinc content is approximately 7-8mg per 100g of whole seeds (lower in extracted oil but still present in cold-pressed variants). Vitamin E complex includes tocopherols (~40-60mg/100g, primarily gamma-tocopherol) and tocotrienols providing antioxidant protection to follicles. Cucurbitacins (tetracyclic triterpenoids) contribute additional anti-androgenic activity. Phytosterols total approximately 200-300mg/100g in cold-pressed oil. Carotenoids (~3-4mg/100g) support scalp tissue integrity. Bioavailability note: lipid-soluble compounds (sterols, tocopherols) absorb significantly better when taken with dietary fat; cold-pressed, unrefined oil preserves the highest delta-7-sterol concentration compared to refined variants.

Reported Mechanism (Provisional)

Mechanism of Action

Pumpkin seed oil's phytosterols, particularly delta-7-stearine and beta-sitosterol, competitively inhibit 5-alpha-reductase type I and II enzymes. This reduces conversion of testosterone to dihydrotestosterone (DHT), the primary hormone causing androgenetic alopecia. The oil also improves scalp microcirculation through prostaglandin modulation, enhancing nutrient delivery to hair follicles.

Clinical Narrative (Provisional)

A randomized controlled trial with 76 men showed 400mg daily pumpkin seed oil increased hair count by 40% after 24 weeks versus 10% in placebo group. Another study of 35 men found 30% hair count improvement with similar dosing over 6 months. Evidence is limited to small-scale trials lasting under one year. More robust, long-term studies are needed to confirm sustained efficacy.

Also Known As

Cucurbita pepo seed oilPepita oilStyrian pumpkin seed oilGreen gold oilKürbiskernölPSOPumpkin kernel oil

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These statements have not been evaluated by the Food and Drug Administration. This content is for informational purposes only and is not intended to diagnose, treat, cure, or prevent any disease.

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