Raw water: the unsterilised health craze that could give you diarrhoea

Its adherents say it is full of good things that ordinary filtered tap water has lost. Its critics say it might well give you ‘beaver fever’ – among other illnesses

‘I feel less stuffed after dinners – and less guilty’: why I stopped eating meat

My journey towards vegetarianism started 30 years ago for practical reasons, but the more I eschew animal products the better I feel about everything

David Davis’s ignorance: now that’s what I call health and safety madness

Austerity has already driven a coach and horses through environmental standards – and we haven’t even got to the Brexit cliff edge yet, writes the Guardian columnist Polly Toynbee

The Guardian view on the Nobel prize for medicine: about time

Editorial: The discovery of two interacting genes which make a body clock shared by all living things is a triumph that deserves its prize

Vivienne Westwood on her secret to staying young: bathe once a week

Fashion designer, 76, says not washing too much is the secret to seeming young, while her husband, Andreas Kronthaler, says he washes even less often

Experience: a ladybird nearly killed me

My foot looked like a giant’s. I was shocked. I was 31 and very fit. I’d never been ill in my life

‘Brexit virus’: an EU-plot to sabotage the great British breakfast

A strain of hepatitis E carried by some continental pigs has been given a topical nickname. So, do we need to vote leave on bacon?

Air pollution linked to poor sleep, study finds

Exposure to nitrogen dioxide and airborne particles affects sleep efficiency, says medical professor

Sweetness of woodruff lingers down the ages

Country Diary: Benthall Edge, Shropshire This plant has had a symbolic, medicinal and folkloric importance for centuries

Royal Institution’s new director Sarah Harper: we must show gold standard for science

Second woman to be appointed in RI’s 218-year history identifies role, in era of fake news, to supply trusted data across many issues from health to climate change and robotics