Doctors could have found a cure for the baldness condition alopecia after a new wonder pill appeared to fully restore the hair of three patients.
Experts were able to develop the drug, called ruxolitinib, after identifying the immune cells responsible for destroying hair follicles in people with the condition.
So far only pilot trials of the drug have been conducted. But within five months all three patients who took part experienced full hair regrowth.
Lead researcher Dr Raphael Clynes, from Columbia University Medical Center in New York, said: "We've only begun testing the drug in patients, but if the drug continues to be successful and safe, it will have a dramatic positive impact on the lives of people with this disease."
Alopecia affects around one in 100 people in the UK. Famous sufferers include TV presenter Gail Porter and Olympian cycling champion Joanna Rowsell.