Elderberry rosehip and blackcurrant concentrates elderberry rosehip and blackcurrants are all exceptionally rich sources of important compounds called flavonoids including anthocyanidins that are known potent antioxidants indeed to truly maximise antioxidant defences plant derived antioxidants should be incorporated into patients regimes the flavonoid family found in these three fruits is uniquely positioned for such a task since they are physiologically active in both lipid and aqueou