Start school later, sleep longer, learn better: New study shows that flexible school start times can be an effective and practical approach to reducing chronic sleep deprivation and improving adolescents’ mental health and academic performance.

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O'Farrell said his weight loss with the drug was "almost instant" and that, as well as losing more than five stone (34kg) so far, he has more energy and has been able to exercise for the first time in years.

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William Harwood