A cure for baldness could be on the horizon thanks to a chemical used in McDonald’s fries.Scientists have regrown hair in mice using a ‘simple’ technique – using human stem cells. This generated fresh follicles capable of sprouting luxurious new locks. Within days the lab rodents had furry backs and scalps. Preliminary experiments suggest the groundbreaking therapy will also work in people. The Japanese team’s breakthrough came after they managed to mass produce ‘hair follicle