Although it affects millions of men, including untold numbers in their thirties and forties, just one per cent of those suffering from the male menopause are diagnosed.
The new research removes a major obstacle to treating what doctors say is the most common hormonal disturbance among men. Testosterone treatment is available through the UK's National Health Service (NHS), but it is very scarcely used and cannot be prescribed by GPs, partly because of the fears about cancer.
The research breakthrough comes at the start of Britain's first ever Andropause Awareness Week, at the same time as scientists and clinicians gather in Munich to discuss advances in knowledge and treatment.
Several high-profile men have been diagnosed with the condition recently. The singer Robbie Williams was diagnosed earlier this year and record producer Pete Waterman and opera singer Ian Storey are also sufferers.
The Andropause Society's chief executive, Paul Pennington, who himself has the condition, said: "It is extremely gratifying to know we can finally remove one of the obstacles that has seemingly prevented the medical profession from treating this common hormonal disturbance in men, which can wreck their lives, loves and health. Unfortunately, the views about the dangers of TRT are about 20 years out of date. The experience of clinicians has shown that rather than being dangerous, carefully regulated and monitored TRT has been shown to be remarkably safe."
Low testosterone is associated with diabetes, heart failure, obesity and osteoporosis. Doctors believe that raising levels of the hormone could help reduce the incidence of these conditions.
Dr Malcolm Carruthers, one of the authors of the University College Hospital research, said: "This myth that TRT was linked to prostate cancer has persisted. It arose from research in the 1940s based on very few cases. It has stopped so many men from getting testosterone treatment."
Dr Carruthers said doctors still need to be more open to diagnosing the condition.
He said: "At the minute, the condition is neither recognised nor treated, despite the fact that it wrecks men's lives and results in misery on a large scale that could easily be prevented and treated."
- INDEPENDENT