Antihypertensive properties of flavonoid-rich apple peel extract

► Apple peel is a rich source of flavonoids which provide numerous health benefits. ► Apple peel flavonoids (FAE) inhibited ACE, an enzyme associated with hypertension. ► Enzyme kinetic studies revealed that flavonoids are competitive inhibitors of ACE. ► Human metabolite, quercetin-3-O-glucuronic acid had the greatest ACE inhibition.