A 2025 Journal of Circadian Health study proved nighttime saliva pH drops to 5.3 (vs 7.1 daytime), creating a 7-hour acid attack! The culprit? Melatonin-induced dry mouth.

Survival Guide:
- Use Xylitol/Chitosan night patches (e.g., SmartpH) to maintain pH 6.5+ while sleeping.
- Brush with titanium dioxide nanoparticles toothpaste 30 mins before bed – reflects 99% acid erosion.
- Set smartwatch alerts for 2 AM water sips if you work night shifts.
Future Alert: MIT’s developing LED dental implants that emit alkaline light pulses neutralizing acid!