Heat-Killed Enhances Positive Mood States: A Randomized, Double-Blind, Placebo-Controlled Study.

When mood states are impaired, daily life is severely disrupted. To maintain a specific mood state, both positive and negative moods must be controlled; however, methods to maintain a positive mood have not been fully established. Previous studies have suggested that heat-killed MCC1848 has the potential to improve positive moods.