It was previously thought that only two per cent of men over 50 were affected. But new research shows 20 per cent of the 10 million men in the UK over 50 are likely to have Testosterone Deficiency Syndrome, according to Dr Malcolm Carruthers, medical director of the Centre For Men's Health in London's Harley Street.
"It is astonishing that this most common hormonal disturbance in men, which can wreck their lives, is the least commonly treated," the Daily Express quoted him as saying.
"The condition can be difficult to diagnose because the overall level of testosterone in the blood is often within so-called normal limits.
"In my experience this makes many doctors reluctant to accept the idea," he added.