The global prevalence of type 2 diabetes mellitus has become a major public health challenge. Dietary intervention is a cornerstone of diabetes management, yet the optimal macronutrient composition remains an open question. In this study, mice were fed a western (W) diet, a moderately high-fat (MHF) diet, a high-protein-high-carbohydrate (HPHC) diet, or a high-protein-low-carbohydrate (HPLC) diet for 22 weeks to compare the effects of different dietary patterns on glucose homeostasis. Our results showed that a MHF diet, under consistent nutrient quality, was most beneficial for glucose metabolism. The MHF diet reduced two key inducers of diabetes─lipid accumulation and inflammation. Downregulation of intestinal CD36 induced by loss of colonization restrained lipid absorption and lipopolysaccharide (LPS) transport, which played a crucial role in MHF-mediated resistance to lipid accumulation and inflammation. The findings endorse a dietary pattern featuring MHF of appropriate nutrient quality as an effective strategy for diabetes management.
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