Does Keto, That Celeb Diet Everyone’s Doing, Actually Work?

It's favoured by everyone from Kourtney Kardashian, to Halle Berry, to LeBron James.

If any diet could be a celebrity or a movie star, it would almost certainly be the keto diet — the low-carb, high-fat, weight loss diet that everyone seems to be doing nowadays. But is it safe? Is it sustainable? Does it actually work? Before you consider trying it out, here are some of the facts you’ll need to make an informed decision. (Hint: you will, at first, get sick.)