Should I stop using fluoride toothpaste?

Somebody told you to stop using fluoride toothpaste, and depending on who it was you are either reassured or deeply suspicious.

The answer depends almost entirely on who said it and why. There are real clinical reasons to come off fluoride, they are specific, and they are not the reasons the internet usually gives.

Ask which reason you were given

A dentist telling a patient to stop fluoride is unusual enough that the reason matters. The legitimate ones are specific: very young children swallowing paste, a diagnosed allergy to an ingredient, or certain kidney conditions where total intake is being managed.

If the reason was none of those, it is worth asking again and writing down the answer. A clinician who recommends something unusual will normally explain it without being defensive.

Second opinions on this cost one appointment and settle it. Dentists disagree about plenty of things and this is one where the mainstream position is unambiguous.

You mean fluoridated toothpaste/home products? Yes I do. What do I think when patients say they don’t use fluoride? That I’ll be making some cash off them and their families later. In my experience they have much higher decay rates. The vast majority of patients are using fluoride though

— r/askdentists

What fluoride actually does to the tooth surface

Fluoride works by changing the mineral itself. It incorporates into the enamel surface as fluorapatite, which dissolves at a lower pH than the original mineral, so the tooth tolerates more acid before it starts losing material.

It also slows the bacteria in plaque and helps the surface take mineral back up between meals. The mechanism has been studied for a long time and across very large populations.

That length of record is the real argument for it. Anything newer is being compared against a material with decades of data behind it.

Looks like erosion to me! And not a mild case imo. More research is needed when it comes to nano-hydoxyapatite. For the meantime, keep using fluoride toothpaste 😊

— r/askdentists

The safety argument is about swallowing, not brushing

Almost every concern raised about fluoride concerns total intake: water supply, supplements, swallowed paste. Brushing and spitting delivers a small amount to the tooth surface and very little to the rest of you.

The dose at which fluoride causes harm in adults is far above what a toothpaste tube can deliver when it is used as intended. Dentists tend to answer this question bluntly for that reason.

Children are the genuine exception and the reason paste for them is formulated differently. A smear for under-threes, a pea for older children, supervised so most of it is spat out.

• under three: a smear, supervised
• three to six: a pea, supervised, spat out
• adults: a normal amount, spit and do not rinse
• never swallow paste as a habit at any age

If you are worried about overdosing on fluoride, just use it as directed. The amount you would have to eat of fluoride toothpaste to overdose as an adult and get neurological problems is insane. So just don’t sit down and eat crates of fluoride toothpaste and stop worrying about it.

— r/askdentists

Fluorosis is a real thing and it is not caused by brushing

Dental fluorosis is the mottling or white flecking people have usually seen photographs of, and it only happens while teeth are forming under the gum, in childhood. An adult cannot develop it.

It comes from too much total fluoride during those years, which generally means swallowed toothpaste and supplements together rather than brushing alone.

White marks appearing on an adult's teeth are something else, most often early demineralisation or erosion, and both point toward more protection rather than less.

Hydroxyapatite is the reasonable alternative

Hydroxyapatite is the mineral enamel is made of, and in toothpaste it deposits onto the surface directly. Japanese products have used it for decades and the European evidence base has grown considerably.

Honest comparison: the research on it is encouraging and much smaller than the research on fluoride. People who cannot or will not use fluoride have a credible option; people with no particular reason to switch are trading a long record for a shorter one.

Anyone with active decay or a history of it is the group with least room to experiment.

I want to remineralize my teeth but also continue getting the benefits of fluoride. Right now I am seriously considering using two different toothpastes in my routine.

— r/Biohackers

Using both is allowed and often the sensible answer

Alternating is common: hydroxyapatite in the morning, fluoride at night, or the reverse. There is no conflict between the two materials and nothing is wasted.

If the goal is less fluoride rather than none, that arrangement halves the exposure while keeping the night brushing, which is the one that matters most.

Whichever you choose, spit and skip the rinse. Washing the paste straight out is the most common way people get nothing from either material.

Common questions

Is there a good reason to stop using fluoride toothpaste?

There are a few specific ones: a diagnosed allergy to an ingredient, certain kidney conditions where total intake is managed, and very young children who cannot spit. Outside those, stopping means giving up decades of accumulated evidence.

Is fluoride toothpaste safe to use every day?

Used as directed, yes. The concerns raised about fluoride almost all involve swallowed quantities rather than brushing and spitting. The amount that reaches the rest of the body from normal brushing is very small.

Can adults get fluorosis from toothpaste?

No. Fluorosis only develops while teeth are forming under the gum during childhood. White marks appearing on adult teeth are usually early demineralisation or erosion, which call for more protection rather than less.

Is hydroxyapatite toothpaste as good as fluoride?

The research on it is promising and considerably smaller. It is a credible option for people who cannot or will not use fluoride, and a trade of a long evidence record for a shorter one for everyone else.

Can you use fluoride and hydroxyapatite toothpaste together?

Yes, usually by alternating morning and night rather than mixing them in one brushing. The two do not conflict, and it is a practical arrangement for anyone who wants less fluoride rather than none.

Go back to whoever told you to stop and ask for the specific reason in writing. If it is an allergy, a kidney condition, or a child who cannot spit, that is a real answer and you have one.

If no specific reason comes back, keep the fluoride at night and use hydroxyapatite in the morning if you want less of it. That keeps the brushing that does most of the work and still cuts the exposure.