Lactobacillus gasseri NK109, Lactiplantibacillus plantarum MWFLp-182, Lactobacillus johnsonii CJLJ103, and L. lactis KC24 alleviated LPS, D-galactose, or scopolamine-induced cognitive impairment by upregulation of inflammation-mediated BDNF expression [28, 33, -35]. Here, BDNF is linked to Cognitive impairment.