Far from throwing anything into doubt, new studies add weight to what you already knew
It’s been a rollercoaster few months in the world of nutrition science – which is saying something, given the wildly contradictory claims emanating from that field as a matter of course. (You know the sort of thing: will fish oil or dark chocolate or a daily glass of wine keep you healthy to 100, or drive you to an early grave?) Now, a big US study has found that low-carb diets could shorten life expectancy by up to four years. Meanwhile, there’s a crisis with PrediMed, the landmark study purporting to show that a “Mediterranean” diet – fish, nuts and vegetables, slathered in olive oil – could cut heart disease risk by a third. It turns out it wasn’t properly randomised, throwing that finding into doubt.