Mouth breathing lowers testosterone, disrupts ovulation, damages sperm, and blocks the hormone cycle your body runs every night during sleep. Here's the fix.

In Part 1, we followed the biology — the four ways your nose is wired to your reproductive system. In Part 2, Nisha breaks down exactly what chronic mouth breathing does to that system over time, and delivers a complete five-practice nasal breathing protocol for reproductive and sexual health.

What you'll learn:

The hormone loop — how mouth breathing keeps cortisol elevated, which depletes testosterone and estrogen, which degrades nasal tissue, which forces more mouth breathing, which drops hormones further. The full cycle explained.

Why testosterone is produced during deep sleep — and exactly how mouth breathing and sleep apnea interrupt that production cycle every n ...