With 14 million new cases of diabetes each year being attributed to poor diet and half the worlds' population estimated to be overweight or obese by 2035, it's no wonder the UK's Chief Medical Officer, Chris Whitty, claims the situation around these conditions presents one of 'the biggest future health challenges we face.' So why is it happening and what can be done to reverse these worrying trends? We find out what dieting does to your metabolism, and whether the effectivness of weight loss drugs in the short term might make them a part of the solution... Like this podcast? Please help us by supporting the Naked Scientists