I have been following 5:2 for 7 months (loosely) & wondered if anyone else in here does. I started it after watching a doco by Michael Mosely & when I was struggling to re-motivate myself to lose 5kg. It isn't easy as the "fast days" are tough. Women eat no more than 500 cals on fast days & you eat to your TDEE on the other 5. I have lost a steady kilo per month since starting & have decided to drop a further 5kg, to get back down to my lowest adult weight. I would be interested to hear from anyone else doing it.