"The G Plan diet runs over 21 days and three phases, with the aim of overhauling the body's supply of gut-friendly bacteria," Kate explains.
"Phase one - Rest - lasts five days and involves eliminating any fad, junk foods that have crept into your diet, as well as undergoing a semi-detox. It's not exactly fasting, but I'd recommended you follow a paleo-style diet and drink heaps of water to really give your digestive system a break.
"Phase two is called Re-wild and this is a nine-day process of introducing gut-healthy superfoods and drinks, like miso, sauerkraut, pickles, kombucha, that really nurture your digestive system.
"Then, finally, you enter the week-long Rebalance phase. This is when you start to re-introduce your everyday healthy foods, like meats, fish and so on, while keeping your diet free from any unhealthy foods."