A probiotic that can help you stay fit?. Lactobacillus Gasseri is a unique species of probiotic with activity that sets it apart from all other strains. refrigeration necessary. With 95% of feel-good-hormone serotonin levels found in the gut, probiotics such as L. gasseri help support the GI tract, and in turn help support leptin and serotonin balance in the body.
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