Hyperlipidemia is one of the main risk factors for cardiovascular disease. Shallot (Allium cepa L.) peel extract contains flavonoids, particularly quercetin, which has potential antihyperlipidemic activity; however, it is limited by low bioavailability. This study aimed to formulate a chitosan–sodium alginate–based nanosuspension of shallot peel extract and to evaluate its physical characte…