08:32The Food ChainIn Search of Wine's 'Holy Grail'BBC World Service Duration: 27 minutes Sun 14th Jan 2018, 08:32 on BBC World Service Americas and the CaribbeanAvailable for over a yearListen nowThe quest to curb rising alcohol levels in wine without losing flavour. Show more GenresFactualFood & DrinkFormatsMagazines & ReviewsBrandThe Food Chain Source: BBC Online