Effects of Cricket Powder Supplementation on Gut Microbiota in High-Fat Diet-Fed Mice

The gut microbiota plays an important role in host physiology and is highly influenced by dietary factors. This study aimed to investigate the effects of cricket powder (CP) supplementation on gut microbiota composition in high-fat diet-fed C57BL/6J mice. Male C57BL/6J mice were fed a normal diet or a high-fat diet. Mice fed the high-fat diet were administered low, medium, or high doses of CP by gavage. Serum lipid levels and liver-related biochemical indicators were measured, and gut microbiota composition was analyzed using 16S rRNA gene sequencing. We found that CP supplementation significantly (p < 0.05) altered gut microbiota diversity and community structure, with differences observed among CP doses. Alpha diversity indices were significantly reduced after the intervention (p < 0.05). Beta diversity analysis showed no significant separation among groups before the intervention, whereas a clear separation in gut microbiota structure was observed after the intervention. Correlation analysis further revealed that beneficial bacterial genera, including Lactobacillus, Bifidobacterium, and Akkermansia, were negatively associated with lipid-related parameters. Overall, these findings suggest that CP supplementation can modulate gut microbiota composition under high-fat dietary conditions, indicating its potential role in metabolic regulation.