So… fat cells aren’t necessarily bad! Is that it? According to a research recently published in Developmental Cell, fat cells help with the wound healing process in fruit fly. When the fly pupae has a wound, immune cells called hemocytes arrive to the site first and fat cells follow. Then, hemocyces are brushed aside by the fat cells, which take over the healing process. Fat cells in humans and other vertebrates probably have the same function, according to the researchers.