Lotus seedpod proanthocyanidin-whey protein complexes: Impact on physical and chemical stability of β-carotene-nanoemulsions

•Lotus seedpod proanthocyanidins (LSPCs) considerably improved the chemical stability of β-carotene nanoemulsions.•LSPC addition promoted droplets of β-carotene nanoemulsion aggregation at pH 4.•Whey protein-LSPC complexes could be used as natural emulsifiers with antioxidant and emulsifying ability.