How nostrils control your nervous system

This deep dive examines the March 2026 peer-reviewed paper published in MDPI Behavioral Sciences titled “Know Your Nose”. We explore the exact physiological mechanisms that occur during unilateral nasal breathing, specifically how it produces a measurable increase in parasympathetic tone and improved heart rate variability (HRV).The discussion covers the asymmetric effects documented in the study: how left nostril breathing reduces hyperarousal and improves sleep quality, while right nostril breathing reduces stress perception. Learn why these 2026 findings provide the “hard data” for why practitioners have used these techniques for centuries to balance the nervous system. This is a public episode. If you would like to discuss this with other subscribers or get access to bonus episodes, visit breathlab.substack.com