Table 2: Neurochemicals isolated from various microbes (as from [140]).

Genus Neurochemical Lactobacillus and Bifidobacterium GABA Escherichia, Bacillus, and Saccharomyces Norepinephrine Candida, Streptococcus, Escherichia, and  Enterococcus Serotonin Bacillus and Serratia Dopamine Lactobacillus Acetylcholine