Kathy Groves from Leatherhead Food International and Alan Smith, a consultant who has worked for the British government on nanotechnology, give their views on the definitions, and the areas of greatest potential - from taking out the bad (salt, fat) and adding in the good (micro- and macronutrients).
Unanswered questions and areas of concern are also addressed in this round table dicsussion, conducted at Vitafoods 2009 in Geneva.