Sleep deprivation and time of day can have an impact on tests

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Researchers from the [b]University of Surrey[/b] and the [b]Institute of Cancer Research, London[/b], investigating the links between sleep deprivation, body clock disruption and metabolism, discovered a clear variation in metabolism according to the time of day, reports [s]Health Canal[/s]. Lead author Professor Debra Skene from the University of Surrey, said: ‘Our results show that if we want to develop a diagnostic test for a disease, it is imperative to take the time of day when taking blood samples into account, since this has a significant effect on metabolism. This is also key for administering medicines and determining when they will be at their most effective. Of course, this will have to be considered on a case-by-case basis, since many people such as shift workers will have a different sleep/wake cycle.’

Full Health Canal report
Proceedings of the US National Academy of Sciences full text

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