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Pumpkin seed

Seed oil with hair hopes, allergy cautions, and small trials

Cucurbita pepo

A mustached man lounges inside a giant halved pumpkin like a bathtub, inspecting a seed.
Illustration

The short version

Pumpkin seed oil is pressed from pumpkin seeds. People put it on scalp and skin for a soft, comforting slip and because early studies hint at anti‑inflammatory, follicle‑friendly effects. Most hair research has tested oral capsules, not oil rubbed on the scalp.

Family
Cucurbitaceae
Part used
Seed (pressed oil)
Comes from
The Americas; Styrian pumpkin seed oil comes from Austria

Good for?

Used as a lightweight emollient for skin and as a scalp oil in hair‑loss routines. For hair, one controlled human study tested oral capsules, while topical work is earlier stage. A PSO‑loaded niosome scalp serum showed fewer shed hairs and a higher anagen/telogen ratio over eight weeks in a small in‑use study, with lab signals for 5α‑reductase inhibition and anti‑inflammatory activity. Fermented pumpkin extracts have also shown antioxidant and soothing effects in cell models, supporting its use in gentle skin formulas.

Does it actually work?

Real trials.

Controlled trials on people back it up.

Evidence grade 4 out of 5.

What the studies say

The strongest human signal for hair is a single randomized, double‑blind, placebo‑controlled study of oral pumpkin seed oil in men with androgenetic alopecia that reported increased hair counts over 24 weeks; it has not been independently replicated. Reviews and a network meta‑analysis note that supplement evidence overall is limited and heterogeneous. Topically, a PSO‑loaded niosome serum delivered oil to follicles and, over eight weeks, reduced shed hairs and improved the anagen/telogen ratio in small in‑use testing. Formulation work using PSO alongside other actives suggests follicular targeting is feasible. A double‑blind study of a multi‑ingredient oral supplement containing C. pepo reported gains in hair density, but the effect cannot be pinned on pumpkin alone.

A man checks the top of his head in two angled mirrors next to a curling pumpkin vine.
Illustration

What's inside

  • presentPhospholipidsIdentified among polar lipids in C. pepo seeds.
  • detected; minorSphingolipids (incl. Cer‑EOS–type ceramides)Ceramide species newly highlighted in pumpkin seeds.
  • presentGlycolipidsDetected in seed lipid analyses.
  • presentAcylglycerols (tri‑, di‑, mono‑)Core oil fraction of pumpkin seeds.
  • present; minorOxylipinsReported among bioactive lipid classes.

Read this first

Topically, a PSO serum showed no irritation in a reconstructed skin model. Pumpkin seed allergy exists and can be severe; avoid if you have seed allergies and patch test new products. As with seed‑derived ingredients, buy from reputable suppliers, as some seed protein materials have shown occasional heavy‑metal contamination in testing.

The stories

1 in the Journal

Research Desk · Pumpkin seed

Pumpkin seed oil and thinning hair

One randomized, placebo‑controlled trial found men taking oral pumpkin seed oil capsules had a meaningful hair‑count gain; animal studies and small topical trials add plausible mechanisms but do not settle whether rubbing oil on your scalp will help. Evidence is suggestive but thin and largely unreplicated.

  • Hair

Reviewed

Sources

  1. Cucurbita pepo var. styriaca Seeds: Deep Insights into Polar Lipid Profile. — Paolillo A, Napolitano A, Sottile F, Masullo M, Piacente S. · Foods (Basel, Switzerland) · 2026
  2. Immunoglobulin E-mediated pumpkin seed allergy in children: Case series and narrative review with a structured literature search. — Acikalin B, Ocak M, Sekerel BE. · Allergy and asthma proceedings · 2026
  3. Addressing the Root Causes of Female Hair Loss and Non-Pharmaceutical Interventions. — Leavitt A, Hawkins SD, Kindred C, Frey C, Gainers M, Grekin SK, Leavitt M. · Journal of drugs in dermatology : JDD · 2025
  4. Topical Alternatives for Hair Loss: Beyond the Conventional. — Bikash C. · International journal of trichology · 2025
  5. Oral Supplementation with l-Cystine, Serenoa repens, Cucurbita pepo, and Pygeum africanum in Chronic Telogen Effluvium and Androgenetic Alopecia: A Double-Blind, Placebo-Controlled, Randomized Clinical Study. — Piquero-Casals J, Saceda-Corralo D, Aladren S, Bustos J, Fernández-Botello A, Navasa A, Logusso G, Jourdan E, Mir-Bonafé JF, Morgado-Carrasco D. · Skin appendage disorders · 2025
  6. Dutasteride-loaded nanostructured lipid carrier for androgenic alopecia treatment - An in vivo study. — Heydari S, Barzegar Jalali M, Kouhsoltani M, Radmehr A, Paiva-Santos AC, Barghi S, Hamishehkar H. · BioImpacts : BI · 2026
  7. Effects of dietary supplements on androgenetic alopecia: a systematic review and network meta-analysis. — Zhou L, Zhu W, Chen Y. · Frontiers in nutrition · 2025
  8. Pumpkin Seed Oil-Loaded Niosomes for Topical Application: 5α-Reductase Inhibitory, Anti-Inflammatory, and In Vivo Anti-Hair Loss Effects. — Teeranachaideekul V, Parichatikanond W, Junyaprasert VB, Morakul B. · Pharmaceuticals (Basel, Switzerland) · 2022
  9. Effect of pumpkin seed oil on hair growth in men with androgenetic alopecia: a randomized, double-blind, placebo-controlled trial. — Cho YH, Lee SY, Jeong DW, Choi EJ, Kim YJ, Lee JG, Yi YH, Cha HS. · Evidence-based complementary and alternative medicine : eCAM · 2014
  10. Pumpkin seed oil vs. minoxidil 5% topical foam for the treatment of female pattern hair loss: A randomized comparative trial. — Ibrahim IM, Hasan MS, Elsabaa KI, Elsaie ML. · Journal of cosmetic dermatology · 2021
  11. Niosomal delivery of pumpkin seed oil: development, characterisation, and physical stability. — Morakul B, Teeranachaideekul V, Buraphacheep Junyaprasert V. · Journal of microencapsulation · 2019
  12. Evaluation of the Safety and Effectiveness of Nutritional Supplements for Treating Hair Loss: A Systematic Review. — Drake L, Reyes-Hadsall S, Martinez J, Heinrich C, Huang K, Mostaghimi A. · JAMA dermatology · 2023
  13. Emerging and traditional 5-α reductase inhibitors and androgen receptor antagonists for male androgenetic alopecia. — Gupta AK, Talukder M, Williams G. · Expert opinion on emerging drugs · 2024
  14. An overview of herbal alternatives in androgenetic alopecia. — Dhariwala MY, Ravikumar P. · Journal of cosmetic dermatology · 2019
  15. Beneficial effects of pumpkin seed oil as a topical hair growth promoting agent in a mice model. — Hajhashemi V, Rajabi P, Mardani M. · Avicenna journal of phytomedicine · 2019
  16. Evaluation of the efficacy and toxicity of oral and topical pumpkin oil on the hair growth of mice. — da Cruz GK, Martins MIM, Antunes FTT, de Souza AH, Wiilland EF, Picada JN, Brum LFDS. · Acta histochemica · 2022