As you've hopefully gathered from my past posts, I don't give journalists much credit when it comes to reporting scientific results accurately (their tagline here is ridiculous, and I'm just poking fun with my title here). Still, it's always amusing to read things like this as long as you take them with a pinch of salt:
telegraph.co.uk/news/2017/0...
I suspect they're referring to the PURE study, of which unfortunately only the abstract is available for free:
thelancet.com/journals/lanc...
There's a critique of it here: