Why are we really overweight?

UK adults eat below the recommended calories per day, and most meet suggested activity levels - but more than half of us are overweight or obese, report the latest official figures released today.

DNP: the return of a deadly weight-loss drug

Philip Strange: How could a chemical used a century ago in explosives come to be used by bodybuilders to lose weight? The story of dinitrophenol illustrates the fatal allure of slimming drugs