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| If your sex life is flagging, try some bright lights |
Bright light may help men with flagging sex drives to shine in bed, a study has found.
Exposure to bright light boosts levels of the male hormone testosterone and increases sexual satisfaction, the research showed.
Low sexual desire affects significant numbers of men after the age of 40.
According to some studies, up to a quarter of men report problems depending on age and other factors.
Because sexual interest varies with the seasons, scientists have suspected that it might be influenced by ambient light levels.
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| Low sexual desire affects significant numbers of men after the age of 40 |
To test the theory a team of Italian researchers from the University of Siena recruited 38 men diagnosed with low libidos and treated half of them with daily doses of bright light.
Early each morning for two weeks the men spent half an hour in a room with a light box - a panel designed to emit bright white light.
At the end of the trial tests showed that their testosterone levels had risen significantly. They also reported higher levels of self-rated sexual satisfaction.
Similar effects were not seen in the other group of men whose light box was adapted to emit a low non-therapeutic level of light.
Lead researcher Professor Andrea Fagiolini said: "We found fairly significant differences between those who received the active light treatment, and the controls.
"Before treatment, both groups averaged a sexual satisfaction score of around two out of 10, but after treatment the group exposed to the bright light was scoring sexual satisfaction scores of around 6.3 - a more than three-fold increase on the scale we used. In contrast, the control group only showed an average score of around 2.7 after treatment."
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