In 1923 Therese Neumann, a nun in Southern Germany, stopped eating and drinking. Apart from the wafer given at Mass, she did not eat again, despite living for a further 35 years. Other similar cases have been reported over the years - often holy men from the East - and have taken on something of a mythical status. However, they remain obscure enough to be brushed aside by modern scientists. Michael Werner presents a new type of challenge to sceptics. A fit family man in his 50s, he has a doctorate in Chemistry and is the managing director of a research institute in Switzerland. In this remarkable account he describes how he stopped eating in 2001 and has survived perfectly well without food ever since.