This invention relates to novel probiotic Bifidobacteria strains, particularly, B. pseudocatenulatum strains, and their use as probiotic, and food products, feed products, dietary supplements and pharmaceutical formulations containing them. The bacteria are suitable for the treatment of obesity, diabetes (particularly Type 2 diabetes), and related conditions.本發明提供新型雙歧桿菌益生菌菌株,特別是假小鏈雙歧桿菌菌株;及其在食品、飼料產品、膳食補充劑和藥物製劑中的用途。該細菌適用於治療肥胖、糖尿病及相關病症。