Evaluation of the antioxidant activity of passion fruit (Passiflora edulis and Passiflora alata) extracts on stimulated neutrophils and myeloperoxidase activity assays

► Pulp and rind extracts of Passiflora alata and Passiflora edulis act as antioxidants. ► Antioxidant effects of Passiflora extracts were compared to that of pure isoorientin. ► Extracts were tested on the oxidant activities of neutrophils and myeloperoxidase. ► P. edulis rind extracts, rich in isoorientin, have the highest antioxidant activity. ► Extracts of passion fruits have possible use to control inflammatory response.