My son is trying the Keto diet. Has a cup of coffee in the morning with a glob of butter in it. :: shudder :: I hope he lives long enough to figure out whether that's a good idea or not... I really enjoyed my high-protein, low-carb, high fat diet (complete with bacon and eggs) for a few years too. I was losing weight and getting in fairly decent shape. My wife is still doing it, more or less. Didn't work out so well long term for me though. I think a lot depends on your metabolism or whatever.