"I think I might get an early night, cut the fasting day short"

“It’s being promoted as the key to sustained weight loss and longevity,” he says, unwrapping two salmon fillets at furious speed.
I look at him hard. His eyes are round with marvel, and his zeal so absolutely fresh, it’s as if he’s forgotten that he’s told me this before — back in 2013, when he discovered the 5:2 diet properly, as in for the first time.