BDNF and Parkinson disease: A nutrition from the Mediterranean diet decreases the risk for PD, thanks to the major abundance of SCFA-producing or LPF-containing bacteria in the intestinal microbiome with an effect on the organ barrier function, endotoxemia, NLRP3 inflammasone activation, insulin resistance, and mitochondrial dysfunction, and the production of glucago-like peptide 1 (GLP-1), BDNF, and intestinal gluconeogenesis [78].