Pumpkin seed oil for hair: one trial and its limits

Pumpkin seed oil appears in many lists of natural hair loss remedies, usually as a capsule or supplement. Unlike many home remedies, it has been tested in a placebo-controlled trial. But one trial is not the same as proof. This guide explains what was found, who it applies to, and what to keep in mind.

Why pumpkin seed oil was studied

Pattern hair loss is strongly linked to DHT, a hormone made from testosterone by an enzyme called 5-alpha reductase. See DHT and hair loss.

The researchers behind the main trial noted that pumpkin seed oil had been shown to block the action of 5-alpha reductase and to have anti-androgen effects in rats ¹. That led them to test it in men with pattern hair loss.

The trial

The study was published in 2014 ¹.

• Who: 76 men aged 20 to 65 with mild to moderate pattern hair loss ².
• Design: randomised, double-blind and placebo-controlled. Neither the men nor the researchers knew who was taking the real capsules.
• Dose: 400 mg of pumpkin seed oil a day, taken as capsules (two 100 mg capsules before breakfast and two before dinner), or identical-looking placebo capsules ².
• Length: 24 weeks.

What it found

• Hair count rose by an average of 40% in the pumpkin seed oil group and 10% in the placebo group ¹.
• Men taking pumpkin seed oil rated their improvement and satisfaction higher than those on placebo ¹.
• Side effects were no different between the two groups ¹.

Why you should be cautious

This is one of the better-designed studies of a natural hair remedy, but it still has clear limits:

• It was small. 76 men started, and 12 dropped out during the study ².
• It has not been repeated. The authors themselves called it a first-stage study and said replication is needed to confirm the results ².
• It was funded by the supplement company. The study was supported by a grant from the company that supplied the capsules ².
• It included men only. It does not tell us whether pumpkin seed oil helps women with thinning hair. See female pattern hair loss.
• It tested one specific product. Results may not apply to other pumpkin seed oil supplements, to cooking oil, or to oil applied to the scalp.
• The mechanism was not confirmed. The researchers did not measure DHT levels, so they could not explain exactly how pumpkin seed oil might work ².

What reviews say

A 2024 review of natural alternatives for pattern hair loss included pumpkin seed oil among the major herbal options. It noted that finasteride and minoxidil remain the only FDA-approved medicines for pattern hair loss, and that more research is needed to establish how well herbal remedies work ³.

A 2025 review of herbal remedies for hair loss, which also covered pumpkin seed oil, found that many studies had small sample sizes, short treatment periods and no long-term follow-up, and called for larger, well-designed trials ⁴.

What this means for you

• Pumpkin seed oil is not a proven replacement for medical treatment of pattern hair loss.
• The evidence is promising but early, based mainly on one small trial in men.
• If you have pattern hair loss and want the best-studied options, talk to a doctor about treatments such as minoxidil and finasteride. See minoxidil and finasteride.

If you want to try it

• Talk to a doctor or pharmacist first, especially if you take other medicines or have a medical condition. Supplements are not regulated in the same way as medicines.
• Do not stop prescribed treatment to switch to pumpkin seed oil without medical advice.
• Give it time. The trial lasted 24 weeks, so judge any change over months, not weeks.
• Stop if you notice side effects, and tell your doctor.

What about eating pumpkin seeds?

Pumpkin seeds can be part of a healthy diet. But the trial tested a concentrated oil in capsules, and we found no studies showing that eating pumpkin seeds helps hair loss.

When to see a doctor

See a doctor if your hair loss is getting worse, you notice bald patches, or you are shedding heavily. Hair loss has many causes, and some need specific treatment. See genetic hair loss and sudden severe hair fall.

The bottom line

In one placebo-controlled trial, men with mild to moderate pattern hair loss who took 400 mg of pumpkin seed oil a day for 24 weeks had a larger increase in hair count than those on placebo, with no difference in side effects. That is encouraging. But the trial was small, funded by the supplement maker, included men only, and has not been repeated. Reviews say more research is needed. If you are interested, discuss it with a doctor, and do not use it in place of proven treatment.

Frequently asked questions

Does pumpkin seed oil help hair loss?

One 24-week trial in 76 men found hair count rose 40% with pumpkin seed oil versus 10% with placebo ¹. It has not yet been repeated ².

How much pumpkin seed oil was used in the study?

400 mg a day, taken as capsules, for 24 weeks ².

Does pumpkin seed oil work for women?

The trial included men only, so we do not know ¹.

Is pumpkin seed oil better than finasteride or minoxidil?

It has not been shown to be. Finasteride and minoxidil remain the only FDA-approved medicines for pattern hair loss ³.

Educational content. Not medical advice.