Functional foods is a very popular term in the social and scientific media; consequently, food
producers have invested resources in the development of processed foods that may provide
added functional benefits to consumers' well-being. Because of intrinsic regulation and end-
of-use purposes in different countries, worldwide meanings and definitions of this term are
still unclear. Hence, here we standardize this definition and propose a guideline to attest that
some ingredients or foods truly deserve this special designation. Furthermore, focus is …