Probiotics are essential for human physiological health. You will want to supplement with many different types. One key type is Lactobacillus reuteri and Lactobacillus casei (L. reuteri and L. casei).
You will find several different types of Lactobacillus in probiotics. L reuteri and casei have the following helpful effects on human physiology according to the research.
Helpful antimicrobial activity
Reduces TNF-alpha production and release (inflammatory cytokine)
Supports NGF production (nerve growth factor)
Inhibits adhesion of pathogens-thereby limiting pathogenic effects