Cheat days are not a great idea. The venture creation group I worked with has a nutriceutical microbiome company. the guy who runs it is a friend of mine and said that there is a bacteria that feeds off carbs and takes over your gut flora. if you stop eating sugar this motherfucking bacteria will secrete a small peptide neuro-transmitter that crosses the blood brain barrier and goes directly to your brain telling it to eat more sugar. Apparently, the reason it's so difficult when you cut carbs, and specifically sugar, is that this bacteria is talking directly to your brain telling it to go find some sugar. Yikes! if you starve it, you can drop it's population count but that takes 2 to 3 weeks. A cheat day a weak is like torture. You suffer the punishment of that small peptide and just when you are about to crush that offending bacteria you feed it with a cheat day. Just something to think about.