Red onion peels (Allium cepa L.) contain quercetin flavonoid compounds that serve antihyperlipidemic activity. This study aimed to formulate phytosome preparations of shallot peel extract and evaluate their characteristics as well as their antihyperlipidemic activity in vivo. The phytosomes were prepared using variations of extract and phosphatidylcholine ratios by the thin-layer hydration meth…