If you vape, you've probably wondered: is this bad for my teeth? It's a fair question. Your mouth is the first point of contact with everything you inhale, and e-cigarette aerosol is no exception. We've pulled together the latest research from 2024-2026 to give you a complete picture — what we know, what we suspect, what we still don't know, and what you can do to protect your teeth and gums.