“The combination of citrus extract and vitamin C was found to produce a synergistic antioxidant effect in an in vitro lipoprotein oxidation model.”
“… citrus extract … vitamin C increased the lag time of lipoprotein oxidation, compared with vitamin C alone or a placebo, and was a significantly better antioxidant than vitamin … results and other published studies are highly suggestive of in vitro and in vivo antioxidant synergism between citrus extract and vitamin C.”