Skin gel delivers insulin painlessly through the skin

A new polymer gel allows insulin to pass through the skin, potentially eliminating the need for needles in diabetes treatment. Researchers developed a pH-sensitive polymer that embeds in the skin's outer layer and then releases insulin into the bloodstream, normalizing blood sugar for hours in animal studies. This breakthrough, demonstrated in mice and minipigs, offers a painless alternative to injections and could be used alongside existing diabetes management methods.