Sweets for my sweets ... Fuss Sergey Designing a series of sweetener trials seemed straightforward enough to us as behavioural scientists who specialise in human appetite and obesity. The plan was simple: replace the added sugar in a range of foods with different classes of alternative sweeteners, holding everything else constant. We would start with a simple biscuit with a fruit filling and work from there. In each case we would measure the effects on participants’ eating choices, metabolism a