Yan-Sheng-Yin (YSY), a Chinese natural dietary supplement that promotes good health, is entirely composed of natural foods. Whether YSY is a potential adjuvant intervention for reducing hyperlipidaemia, atherogenesis, or obesity is unclear. This study evaluated the inhibitory effects and mechanisms of YSY for hyperlipidaemia, atherogenesis, and obesity. Experimental results showed that YSY reduced body weight, hyperlipidaemia, fatty liver, and atherogenesis in hyperlipidaemic mice. In addition, YSY promoted lipid metabolism by inducing adiponectin secretion and activation (phosphorylation) of 5' adenosine monophosphate-activated protein kinase (AMPK) and by suppressing the activation of acetyl-CoA carboxylase (ACC) and HMG-CoA reductase (HMGCR). Moreover, YSY inhibited adipocyte differentiation by suppressing peroxisome proliferator-activated receptor gamma (PPAR-γ) and CCAAT/enhancer-binding proteins (C/EBPs). Furthermore, the antihyperlipidaemic effect of YSY was observed in the clinical trial. Our findings suggest that YSY is an adjuvant intervention for treating and preventing hyperlipidaemia, atherogenesis, and obesity.
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