How to beat jet lag

Light therapy A blast of light resets the body clock by suppressing the production of melatonin and keeping you awake during daytime at your destination. If you arrive during the day, stay in sunlight as much as possible. Light is measured in lux: 2,500 lux is about the intensity of indirect sunlight when you stand by a window on a clear spring day and you need 1,000 lux to make an impact on melatonin production. Most electric light is about 500 lux, but you might consider it worthwhile to travel with a portable light visor or a photographic light bulb of 500-1,000 watts that you can plug in to top up background light in your room.

Researchers at Cornell University found that shining a light on the skin behind the knees just as the body reached its lowest temperature (about 5.30am) could shift the body clock back by as much as three hours, though no one knows why.

For lights to help your body clock and jet lag contact www.lumie.com.

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