I sipped an isotonic drink every twenty minutes on my long runs just to keep the cramp away: the day my dentist turned the mirror towards me, I understood what those sips had been doing
Long-distance runners sipping isotonic drinks every twenty minutes to prevent cramps may be unwittingly exposing their teeth to erosive acids. While research remains nuanced, the combination of reduced saliva flow during intense exercise and frequent acid exposure creates a perfect storm for enamel damage.