Picture the scene. It’s mid 2000’s and I haven’t had a crap for ten days. I’m stood, crossed legged, clenching so hard it’s parting the hair on the back of my neck.

“With Dr. Atkins you can eat what you like and STILL lose weight!”

I was two weeks into the crazy new Atkins Diet. Brad Pitt had used it to get shredded for Fight Club and that was enough for me. I had lost weight, of course, but in those days the diet that would evolve into today’s Ketogenic lifestyle, which is ...