First, pollen, pet dander, mold, and dust mites are not the reason humans have allergies.

Second, the cause of allergies is the oversensitive immune system.

Third, probiotics or good bacteria in the airway send messages to the immune system and make it less sensitive.

Fourth, the airway microbiota starts in the mouth. And, it is continuously reseeded by the bacteria in the oral cavity during the processes of breathing, eating, and talking.

Finally, a healthy oral microbiota with sufficient probiotics will sustain a healthy airway resulting in easy breathing.

Read the story on the Science page.

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