Hi all. Ketosis can kick in anywhere from day 3 onwards. You get an awful taste in your mouth and may feel as though you have something in the back of your throat. Your tongue can get a bit furry, some mouthwash and teeth brushing is necessary! (Its not as bad as all that sounds I promise!) The best thing though is that you don't feel hungry anymore. If you feel hunger it's usually just a craving in your head and not in your stomach. I also got an energy rush after week 1 and I've still got it. Never felt better.
Good luck to all you just starting, not that you need it on this, it is the best diet for great results. Stick to it 100% and you will get fantastic results!