A surprising new health benefit has emerged from the sex drug Viagra - which means 3million ageing Britons could have strengthened bones.
The little blue tablet was found to increase the production of vital bone cells, preventing back pain and fractures in old age.
Sildenafil - also known as Viagra - can help human stem cells transform into osteoblasts which help the human skeleton regenerate as it is completely replaced roughly once every 10 years.
As humans get older, they lose more bone than is built, increasing the risk of breaks or osteoporosis, which makes bones brittle and painful.
Follow-up tests on mice by Peking University also suggested a prevention of bone loss.
