Scientists from China and Australia have developed a new chemical that could potentially help restore hair. Minoxidil, the active ingredient in products like Rogaine, is a well-known treatment for hair loss but has poor water solubility and skin permeability. The study combined minoxididil with a microneedle that used stevioside, a naturally occurring sweetener from the Stevia plant, to increase the absorption of the medicine. The researchers developed a dissolving patch that can perform this work while delivering a dose of minxidil to the scalp. In 35 days, hair regrowth was seen in 67 percent of the target area, compared to 25 percent from the control group. However, clinical trials are required to confirm the effectiveness and safety of this treatment in humans.