If you take one thing from this guide, make it this: the single most important feature of a toothpaste is that it contains fluoride. Almost everything else on the packaging, from whitening claims to herbal ingredients, is secondary. Fluoride is the ingredient with the strongest evidence for preventing tooth decay, and choosing a fluoride toothpaste at the right strength does most of the work.
Key takeaways
- Choose a fluoride toothpaste; it is the ingredient that prevents decay.
- Most adults need standard strength fluoride, around 1000 to 1500 ppm.
- Young children need a smaller amount and, under six, a lower-fluoride paste.
- Special formulas for sensitivity, tartar or whitening can help, but fluoride comes first.
- Be cautious with fluoride-free natural pastes and with very abrasive whitening pastes.
Why fluoride is the priority
Fluoride strengthens enamel and helps repair the very early stages of decay before a cavity forms. Decades of research support its use. When you scan a toothpaste box, the fluoride content is listed in parts per million, or ppm. For most teenagers and adults, a standard paste of about 1000 to 1500 ppm is appropriate. People at higher risk of decay may be prescribed a stronger 5000 ppm paste by their dentist. Fluoride in toothpaste works alongside professional treatments like fluoride varnish.
How much fluoride by age
| Age group | General guidance |
|---|---|
| Under 18 months | Usually no toothpaste; clean teeth with a soft brush |
| 18 months to 5 years | Pea-sized low-fluoride paste, around 400 to 550 ppm |
| 6 years and over | Standard fluoride paste, around 1000 ppm |
| Teens and adults | Standard fluoride paste, around 1000 to 1500 ppm |
| Higher decay risk | Stronger paste only if prescribed by a dentist |
These are general guides. For children specifically, our article on how much toothpaste children should use has more detail, and your dentist can tailor advice to your child's risk and water supply.
Choosing a paste for a specific need
Sensitive teeth
If cold or sweet foods make you wince, a sensitivity toothpaste can help by calming the nerve response over a few weeks of regular use. Look for one that still contains fluoride. If sensitivity is new or severe, have it checked, as our guide to sensitive teeth explains, because it can signal another problem.
Whitening
Whitening toothpastes mostly work by scrubbing off surface stains rather than changing the colour of the tooth. They can help with mild staining, but some are quite abrasive if used aggressively. They do not bleach teeth the way professional whitening does. See our article on whether whitening can damage enamel for context.
Tartar control
Tartar control pastes can slow new tartar forming above the gumline, but they cannot remove tartar that has already hardened. Only a professional clean does that.
A word on natural and fluoride-free pastes
Some people prefer natural or fluoride-free toothpastes. The concern is that without fluoride, you lose the main decay-fighting benefit. If you choose one for personal reasons, it is worth discussing your decay risk with your dentist so you can manage it another way.
Frequently asked questions
Is expensive toothpaste better?
Not necessarily. Price does not equal effectiveness. A modestly priced fluoride toothpaste used properly does the job well.
Should I rinse with water after brushing?
It is better to spit out excess and avoid rinsing straight away, so the fluoride stays on your teeth a little longer.
Do I need a different toothpaste for each family member?
Often yes, at least for young children who need a lower-fluoride paste and smaller amount than adults.
Does whitening toothpaste really whiten?
It removes some surface stains but does not bleach teeth. For a real colour change, professional whitening is more effective.
What to do next
If you are unsure which toothpaste suits your teeth, or you have sensitivity or staining you would like assessed, a checkup can give you tailored advice. You can view current options on our offers page.
