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3/21/2026

Topic Reading-Vol.5079-3/21/2026

Dear MEL Topic Readers, 
This is why you only breathe out of one nostril at a time
Your nostrils are the entrance to your respiratory system. They warm, condition, and filter the air you breathe. They also house your olfactory organs, which give you the sense of smell. That’s why when your nose gets stuffy or blocked, you don’t smell or taste well. Without noticing, your nostrils naturally switch between a dominant nostril for airflow while the other rests, called the nasal cycle. Regulated by the autonomic nervous system, this work-and-rest cycle prevents drying, cracking, and maintains mucus health. The cycle usually shifts every two to five hours without our recognizing it. Which of your nostrils is at work now?
Read the article and learn about the mechanism of our nostrils and the nasal cycle.

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