Starting in the early 2000s, science began to study the correlation between the gut microbiome and how the brain functions. Physicians had long observed that many patients with digestive symptoms also had mental health issues, and vice versa. Scientists now widely accept the idea of a “gut-brain axis” — the two-way communication link between the GI tract and the central nervous system. Our Mood Formula 50 Billion probiotic with Stress Support Blend contains L. helveticus and B. longum strains in the amounts clinically shown to support mood, emotional well-being, and relaxation.†