A study published in the journal Hindawi sought to reproduce these effects in humans. Researchers recruited male patients with mild to moderate androgenetic alopecia. Seventy six male patients with androgenetic alopecia received 400 mg of pumpkin seed oil per day or a placebo for 24 weeks. Hair loss treatment: Pumpkin seed oil shown to reverse male pattern baldness (Image: Getty Images) Change over time in scalp hair growth was evaluated by four outcomes: assessment of standardised clinical photographs by a blinded investigator; patient self-assessment scores; scalp hair thickness; and scalp hair counts. Reports of adverse events were collected throughout the study. So, what did the researchers find out?