As very few data are available on both the antioxidant activity
and dose-dependent response,
the aim of this work was to evaluate not only the protective action of six natural purified chlorophyll derivatives (chlorophyll a and b, pheophytin a and b, pheophorbide a and b)
but also the synthetic Cu-chlorophyllin against lipid oxidation employing two methods;
the bleaching of b-carotene in a water/linoleic acid emulsion
and the scavenging of the stable radical 2,2-diphenyl-1-picrylhydrazyl (DPPH).