The phytonutrient properties of onion have been recognized over the past number of year; in particular phytochemicals such as flavonoids and phenolic acids. Ng et al. (2000) explored the phenolic composition of onion tissue (‘Sturon’ cultivar). Phenolic acids and flovonoids were found to be the main phytochemicals present. Protocatechuic acid was in abundance in the papery scales of the onion but was not present in any other layers. Ferulic acid was found in significant quantities in both the papery scales and fleshy scales of the onion. Finally, vanillic acid was present mainly in the papery scales of the onion. Up to 50 flavonoids have been recognized in the scales of an onion. In particular, flavonoids such as flavonols (which give the yellow pigment to onions), anthocyanins (found mainly in red onions) and dihydroflavonols have been characterized in onion (slimestad, Fossen, & Vagen 2007). Rattanachaikunsopon and Phumkhachorn (2009) explored the diallyl sulphide content of shallots. Diallyl disulphide (12228μg/g) was the main diallyl sulphide content was 4982 μg/g