Procyanidin B1 and Coumaric Acid from Highland Barley Alleviated High-Fat-Diet-Induced Hyperlipidemia by Regulating PPARα-Mediated Hepatic Lipid Metabolism and Gut Microbiota in Di... oleh Zehua Liu, Jianshen Liu, Ruoxin Tang, Zhaowan Zhang, Shuangqi Tian