*2.1. Samples*

Fresh mature fruits of *Lonicera caerulea* var.*Kamtschatica* ofWojtek cultivar, from Poland, were provided by "Ponto Agrícola Unipessoal, Lda." (Portugal). Part of the sample was frozen, lyophilised, and reduced to a fine and homogeneous powder and another part was used to prepare the colouring formulations.
