Fluoride, Explained

Fluoride comes up a lot — especially with parents. Here's what it is, why it matters, and what to think about.

What fluoride is

Fluoride is a mineral, and it occurs naturally in water — in rivers, in lakes, even in the oceans. It's not a chemical somebody invented; it's something that's been around as long as water has.

Why it helps your teeth

Two things, really. First, fluoride prevents cavities by strengthening tooth enamel. Second — and this is the part people don't always know — it can actually help repair the earliest stages of tooth decay, often before the decay is ever visible on an X-ray. It's genuinely useful stuff.

Two ways you get it

Topical fluoride comes from toothpaste — applied to the surface of your teeth. Systemic fluoride is what you swallow, usually in drinking water. Both play a role.

Fluoride isn't just for kids

Fluoride comes up most with parents, but adults benefit from it too. Two common adult issues raise the risk of decay: dry mouth — often a side effect of medications — and gum recession, which exposes the softer root surface of the tooth. Both leave teeth more susceptible to cavities. If either one applies to you, Dr. Carroll may recommend a prescription fluoride toothpaste, an in-office fluoride treatment, or both, to bring your risk back down.

Worth knowing about bottled water

Most bottled waters don't contain optimal fluoride levels. Some do — if they do, it'll usually say so on the label. If your household drinks mostly bottled water, that's worth mentioning at your next visit so we can make sure you and your kids are still getting enough.

And about supplements

Before starting your child on any vitamin or supplement that contains fluoride, check with us first. Whether they need extra depends on what's in your water, and the answer is different for different families. We're happy to help you figure it out.