Obesity is a serious health problem worldwide and can lead to the development of metabolic syndromes, including hypertension, type 2 diabetes, and hyperglycemia. Therefore, we investigated the effect of an ethanol extract of Sargassum horneri (SH) on high-fat diet (HFD)-induced obese mice. To determine whether SH has an anti-obesity effect, C57BL/6mice fed with HFD containing SH (100 and 300mg/kg) were investigated for 7 weeks. The administration of SH significantly reduced body weight, white adipose tissue weight, fat accumulation in the liver, and white adipose tissues by increasing the mRNA expression of mitochondrial uncoupling protein 1 and mitochondrial uncoupling protein 3 in brown adipose tissues. Additionally, serum triglyceride, cholesterol, and leptin levels were significantly decreased in the mice administered SH compared with those of the HFD group. Our results showed that the ethanol extract of SH may be used as a functional food for treating obesity. All rights reserved, Elsevier.

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