The present invention relates to the Bifidobacterium CECT 7765 strain, to its cell components, metabolites, and secreted molecules, to the combinations thereof with other microorganisms, and to compositions comprising the aforementioned products, as well as to the use of a strain of the Bifidobacterium pseudocatenulatum species, or to using the CECT 7765 strain for the prevention and/or treatment of obesity, overweight, hyperglycemia and diabetes, preferably type 2 diabetes mellitus, hepatic steatosis or fatty liver, dyslipidemia, metabolic syndrome, immune system dysfunction associated with obesity and overweight； and an unbalanced composition of the intestinal microbiota associated with obesity and overweight.本發明關於假小鏈雙歧桿菌CECT7765菌株、其細胞組分、代謝物及分泌分子、彼等與其他微生物之組合及包含該等上述產物之組成物、以及假小鏈雙歧桿菌種之菌株的用途、或該CECT7765菌株於預防及/或治療肥胖症、過重、高血糖症及糖尿病(尤其是第2型糖尿病)、肝脂肪變性或脂肪肝、血脂異常、代謝徵候群、與肥胖症和過重相關的免疫系統功能失調、及與肥胖症和過重相關之腸內微生物叢組成失衡之用途。
