pBioactive ingredients, including both bioactive compounds and bioactive live organisms, are present in small amounts in natural sources such as fruits and vegetables. These ingredients have been continuously investigated during the last few decades and the epidemiological data suggest that their intake is associated with significant decreased risk of various disorders and chronic diseases owing to their anti-oxidant, anti-bacterial and anti-inflammatory qualities. Some of these natural ingredients such as catechins, curcumin, resveratrol, oleuropein, quercetin, rutin, hesperidin, sulforaphane, ellagic acid, and anthocyanins, have been studied as factors with possible direct or indirect effect on specific molecular pathways which are playing vital roles in the association with the pathophysiology of the chronic diseases such as cancer. In light of this, natural foods and food-derived products rich in bioactives have received recent growing attention. It has been reported that frequent