How did you sleep last night? Did your smartring congratulate you on 8.5 sleepmaxxed hours in a cool, blackout-dark room after two hours’ withdrawal from blue light and “devices” and 480ml (per this month’s Vogue) of tart cherry juice? You follow all the advice and it works! Good for you, smuggo, but maybe you’re getting too much sleep.

Research published in Nature this month suggests we probably need fewer than eight hours, while excess shut-eye is associated with accelerated ageing of your organs, in the same way that getting too little is. Using data from the 500,000-strong volunteer UK........

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