Robyn has given you a response that describes one version of 5:2. For more information, google 'The Fast Diet'. Their web site has loads of information and promotes an online 'club' for people that don't want to go it alone. It's UK based but Aussie participants are welcome. Essentially it involves intermittent fasting. Here's a link to my blog post about it if you'd like to read about my experience with ithttps://positive3neg.wordpress.com/2015/01/19/is-there-a-fast-way-to-reduce-cancer-risk/
It's about SO much more than just losing weight. The evidence keeps building for it being an effective way to prevent cancer or to reduce the risk of recurrence. And you get thin! What's not to love!
