Surgeons have also urged the Prince to have emergency hair treatment to avoid losing his heart-throb status.
Dr Nadeem Uddin Khan told the publication that Harry should party as much as he wants because it will all catch up with him.
Khan, who runs Harley Street Hair Clinic - which did a hair transplant on footballer Wayne Rooney, 26, said that he doesn't know why the royals haven't come forward for a treatment.
"It's pretty straightforward and, after all, they can afford it," he added.
Recent snaps of the ginger prince revealed a bald patch, but he is still better off than William, who is two years older to him.
Meanwhile, Jonny Harris, director of the Belgravia Centre for hair loss, said that Harry may have very thin hair by 50, but William will be bald by 40,or perhaps even by his mid-thirties.