In the second study, participants (n = 102) from which 82% (n = 84) consumers from the first study evaluated the freshness of baked products by odour only. All samples were selected based on differences between the major raw ingredient components of the dough (flour, water, yeast, salt, sugar, fat, eggs) as shown in Table 1. Variations within these ingredients ensured that the products differed in their sensory characteristics for odour, taste, flavour and texture.