British singer Robbie Williams receives twice-weekly testosterone injections to boost his sex drive after a doctor revealed he had similar hormone levels to a "100-year-old man".
The Angels hitmaker sought medical advice in Los Angeles about taking the Human Growth Hormone (Hgh) to improve his overall wellbeing.
But he was left stunned when a doctor revealed he had extremely low levels of testosterone - and now insists he feels like a new man after receiving his regular jabs.
He tells Britain's Esquire magazine, "It has changed my life. I feel I'm getting a second wind.
"To cut a long story short I went to get some Hgh. It's what all the old fellas are on out there in L.A. that's making them look 40 instead of 60. It's improving their health, their memory, their hair, skin. Could give you cancer. I weighed that up. Thought I'd have it anyway.
"Went to see a Hollywood doctor. Had my blood tests. Went back. He said, 'You don't need Hgh. You've got the testosterone of a 100-year-old man.' And then everything made sense. It was kind of an epiphany that day."