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Effects of Lactobacillus casei LTL1361 and DFC on body weight (A); small intestine index (B) and colon index (C) of aged mice after 12 weeks of treatment. Gut index was calculated according to the following formula: (tissue weight/body weight), × 100%. Different superscript letters denote a significant difference in the same index (p < 0.05), according to one-way ANOVA.
