Las Vegas: A 69-year-old doctor has become a pin-up after following a diet and exercise regime that has given him the body of a 30-year-old.

Dr Jeffrey Life, the chief medical officer of the Cenegentics Medical Institute, went from flab to fab on his regime which also included injections of the controversial anti-ageing injection, Human Growth Hormone (Hgh), which helps produce lean muscle.

Hgh, like most of our hormones begins to decrease from about the age of 30. It has been shown in experiments to turn-back-the-clock but may also be associated with an increased risk of cancer.

Dr Life said: “Within the next ten years, maybe less, this is going to be thought of as mainstream medicine prevening disease, slowing the ageing process, preventing people from loosing their ability of take care of themselves when they get older, and ending up in nursing homes.”