Food authentication is an issue that has become increasingly important over recent years due in part to the legislative trend away from compositional legislation to label declaration. In the US and Europe working groups have been established to bring scientists, industry and the government together to exchange information about food authenticity. This book surveys the range of analytical methods applied to investigate and confirm authenticity or adulteration. Food manufacturers need to ensure that their products meet the demands of legislation in the countries where they are sold, where as governments need to ensure that tested and valid methods are available to meet the needs of industry and to protect the public from misleading or fradulent labelling. The book assesses the applicability of various methods according to the needs of these different groups. The text should be of interest to analytical chemists, quality assurance personnel, and enforcement officers in local and national governments.