New to gransnet and SO wish I had found it and this thread earlier. However, I could be an intermittent fasting evangelist! I have been dieting on and off for 50 years (ish) and would never do any other 'diet' again. I watched the programme and read the book and actually started 5:2 for the health benefits (not that I think I was particularly unhealthy, and others would say didn't need to lose weight, size 12). I lost so much so fast (haha) that I had to stop... can't afford a whole new wardrobe!. All I can say is that if the health benefits are as compelling as the weight loss then wow! I now do 6:1 if I put on a few pounds (such as on recent holiday) and in a couple of weeks (i.e. 2 fast days) it's gone and some. I have read all 8 pages of this thread, anyone thinking of doing it but daunted, don't do 2 fast days, just do 1 a week. Don't worry about what you eat/drink, it isn't for ever! Look forward to the next day, keep busy, go to bed early. Do it however works for you, what you like to eat, your lifestyle and your mood. I've had days (well 1) when dinner was a glass of Shiraz and a kitkat, ok, not healthy and not recommended but it got me to bedtime! My standard easy fallback is a banana, a cereal bar and a bag of rocket, spinach and watercress with some lean chicken, fish or grated Parmesan over the course of the fast day. It's not like you have to do it the next day. Give it a go. Wish my OH would!