New research from the University of Pennsylvania shows that women pay an average of 40% more than men for minoxidil foams, despite the fact that the men's and women's versions of the hair loss remedy product contain the same drug strength and inactive ingredients. "Gender-based consumer price differences are well-documented, but we believe this is the first analysis comparing the pricing of medication along gender lines," said Jules Lipoff, MD, an assistant professor of dermatology and the study's lead author. The findings, published in JAMA Dermatology, were based on the retail price of the product in 24 different pharmacies across four states. Lipoff suggested women may pay more because they will get more out of the product since they are only required to use the foam once daily, while men are directed to use it twice per day. He added there could also be differences in the cost of product testing, approval, and marketing; however, that still leaves women paying more per ounce. "We recommend that our female patients buy the male version of the product, because it doesn't seem right to ask a woman to pay more when the products are, for all intents and purposes, identical," Lipoff said.