Does Pumpkin Seed Oil Help Improve Scalp Health and Reduce Inflammation?

Pumpkin seed oil, derived from the seeds of the pumpkin (Cucurbita pepo), has attracted attention for its supposed benefits in hair and scalp care. This oil contains fatty acids, antioxidants, and vitamins, which are theorized to contribute to hair growth and mitigate inflammation. While appealing, it is critical to evaluate whether the scientific evidence genuinely supports these claims. Understanding the biochemical properties and how they interact with human physiology is key to discerning its efficacy.

Pumpkin seed oil contains essential fatty acids, carotenoids, tocopherols (forms of vitamin E) and plant sterols (Cho et al., 2014). Vitamin E acts as an antioxidant, combating oxidative stress that can damage scalp cells. Essential fatty acids support the scalp’s lipid barrier, potentially reducing dryness and irritation. However, the mere presence of these nutrients does not guarantee therapeutic effects; their bioavailability, absorption, and metabolic pathways influence actual efficacy. Topical application may help moisturize the scalp, but systemic anti-inflammatory effects require substantiation through rigorous research.

Evidence from Research

In 2014, Cho et al. conducted a randomized, double-blind, placebo-controlled trial in South Korea with 76 men experiencing mild to moderate androgenetic alopecia. Participants consumed 400 mg of pumpkin seed oil daily for 24 weeks, and hair count was measured in a defined scalp area. The study reported a 40% increase in hair count in the pumpkin seed oil group compared to 10% in the placebo group. The authors suggested, based on earlier animal studies, that the oil might inhibit 5-alpha-reductase, the enzyme that converts testosterone to dihydrotestosterone (DHT), but the trial did not measure DHT. The capsules were a branded product supplied by Dreamplus Co., Ltd., which also funded the study. The study did not measure scalp inflammation, was limited to men, and did not follow up long term (Cho et al., 2014).

No human study has measured scalp inflammation with pumpkin seed oil, and the one hair trial did not look at it.

Critical Limitations

There is no human evidence that pumpkin seed oil improves scalp health or reduces inflammation. The one human trial was small and measured hair growth, not inflammation. Variability in product quality, extraction methods, and storage further complicates interpretation. Claims that it calms the scalp are not supported by published human studies.

Pumpkin seed oil contains nutrients that have been proposed to affect hair growth and inflammation, but the only human evidence is one supplier-funded trial that reported higher hair counts with capsules. Future research should involve larger, well-controlled trials, longer durations, and diverse populations. Pumpkin seed oil is not an approved treatment for hair loss or for scalp conditions. If you have an itchy, red or scaly scalp, a doctor or pharmacist can help find the cause.

References

Cho, Y. H., Lee, S. Y., Jeong, D. W., Choi, E. J., Kim, Y. J., Lee, J. G., Yi, Y. H., & Cha, H. S. (2014). Effect of pumpkin seed oil on hair growth in men with androgenetic alopecia: A randomized, double-blind, placebo-controlled trial. Evidence-Based Complementary and Alternative Medicine, 2014, 549721. PMID 24864154. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4017725/

U.S. Food and Drug Administration. (n.d.). Dietary supplements. https://www.fda.gov/food/dietary-supplements

National Institutes of Health. (n.d.). Office of Dietary Supplements. https://ods.od.nih.gov/

World Health Organization. (n.d.). Healthy diets. https://www.who.int/news-room/fact-sheets/detail/healthy-diet