. To this end, weuse model muffins made according to recipes R1 and R2 with the addition of GP to assess the effect of food ingredients and GP on CML formation. However, it is known that high levels of added phytochemicals in food products can be significantly involved in the taste sensation and odour of cereal-based products. Therefore, the attractiveness of control and GP-enriched muffins was first investigated with respect to sensory properties, in order to determine the maximum acceptable dose. Fig. 2 presents the radar plots of sensory data of muffins made with all typically used ingredients and GP at three different levels: 10%, 20%, and 30%. The sensory evaluation of the muffin samples showed that, as the levels of GP increased, the scores for colour, appearance, taste, flavour, and overall acceptance decreased. However, no significant differences were observed up to 20% GP. Samples with the addition of 30% GP were described as having stronger fruity-acidic and sharp notes, and too brown a colour, making them unacceptable. The sharp note, which was perceived significantly only at the highest GP level, probably originates from the presence of PCs, and especially of catechins (Scharbert & Hofmann, 2005).