The present invention is related to a fermented cereal hydrolyzed peptide comprising an amino acid sequence as set forth in SEQ ID NO 1. Because the fermented cereal hydrolyzed peptide has effects of lowering body fat, blood lipids, blood sugar, and blood pressure, the present invention also provides a use of fermented cereal hydrolyzed peptide for preparing a food composition and a pharmaceutical composition for preventing and/or treating metabolic syndrome.本發明係有關一種發酵穀米水解胜肽,其包含有如SEQ ID NO 1的胺基酸序列。由於該發酵穀米水解胜肽具有降體脂、血脂、血糖、及血壓之功效,因此,本發明也提供該發酵穀米水解胜肽用於製備防治代謝症候群之食品組成物與醫藥組成物的用途。