The diets being tested this time include the 5:2, Master Cleanse, the All You Can Eat and the coffee-based regime. There's also a look at virtual gastric band surgery.
The weight-loss regimes road tested this time include the Grapefruit, Apple Cider Vinegar, Skinny Gut, Raw Food and Fast Food diets. And Xand looks into DIY enemas.
The weight loss regimes tested this time include the High-Fat, the Mediterranean, the Cookie and the Paleo, and a diet where a protein solution is fed straight into the tummy