By Alexander Angeloff, founder of TranscenDental. We make a toothpaste, so we have a stake in this question; we've tried to lay out the options fairly, including ones that aren't ours. Educational content, not medical advice.
When your mouth runs dry, toothpaste stops being a background choice. With less saliva to rinse, buffer and protect, harsh ingredients sting more and your teeth are more exposed to decay. The right toothpaste won't cure dry mouth, but the wrong one can make it noticeably worse.
The short answer: the best toothpaste for dry mouth is gentle and protective. Look for one that's SLS-free, mild in flavor and low in abrasion, with an ingredient that supports enamel (fluoride or hydroxyapatite). Betaine and xylitol are useful extras. If your dry mouth is severe or you're getting new cavities, ask your dentist about a prescription high-fluoride toothpaste.
What I brush with every day
Why toothpaste matters more with dry mouth
Saliva is your mouth's natural defense. It washes away food, neutralizes acids and carries calcium and phosphate back to your enamel. The US National Institute of Dental and Craniofacial Research notes that dry mouth increases the risk of tooth decay and fungal infections (NIDCR).
That changes what you need from a toothpaste in two ways:
- Protection matters more. With less saliva bringing minerals back to your teeth, the enamel-supporting ingredient in your toothpaste is doing more of the work.
- Gentleness matters more. A dry mouth lining is easier to irritate, so detergents, strong flavors and alcohol that a healthy mouth shrugs off can burn or sting.
If you're not sure why your mouth is dry, start with dry mouth at night: causes and what helps. Mouth breathing, medications and CPAP are common culprits, and fixing the cause does more than any toothpaste.
What to look for (and what to avoid)
| Look for | Why |
|---|---|
| No SLS (sodium lauryl sulfate) | SLS is the foaming detergent in most toothpastes and can irritate the lining of the mouth. Dry mouth guides commonly recommend avoiding it. |
| Fluoride or hydroxyapatite | Supports enamel when saliva can't. Fluoride is the standard; hydroxyapatite is a fluoride-free option with good clinical evidence for decay prevention in general. |
| Betaine | In small Finnish trials, an SLS-free toothpaste with 4% betaine relieved some dry mouth symptoms, such as lip dryness and difficulty eating. |
| Xylitol | Not fermented by the main cavity-causing bacterium, and it draws moisture and stimulates saliva. |
| Mild flavor, low abrasion | Strong mint, cinnamon and gritty pastes are more likely to sting or scratch a dry mouth. |
Things to avoid or use with care:
- SLS and sodium coco-sulfate. Coco-sulfate is coconut-derived but mostly the same compound. More in SLS-free toothpaste: who it helps.
- Alcohol, which is more common in mouthwash than toothpaste. Alcohol-based rinses can dry the mouth further.
- Peroxide whitening formulas and highly abrasive pastes, which can sting or wear on teeth that are already less protected.
- Intense flavors if your mouth burns easily.
On the betaine research: the trials were small, and they tested 4% betaine in a specific paste, so treat it as promising rather than proven (Rantanen et al., 2003; Söderling et al., 1998). Note that betaine is different from cocamidopropyl betaine, a foaming detergent with a confusingly similar name.
Your options: dry mouth, prescription and fluoride-free
Dry mouth toothpastes
Brands like Biotène make toothpastes marketed specifically for dry mouth. Biotène's are fluoride toothpastes formulated to be gentle, and its Fresh Mint Original is free of SLS (Biotène). They're widely available and a reasonable starting point if you want fluoride.
Prescription high-fluoride toothpaste
If your dry mouth is severe, for example from radiation, Sjögren's disease or several medications, and especially if you're getting new cavities, this is the option to ask about. High-fluoride toothpaste at 5,000 ppm has more than three times the fluoride of regular toothpaste, and dental teams prescribe it for people at higher risk of decay, including people with dry mouth (Oral Health Foundation). We'd rather you hear that from us than not at all: if you're at high risk, talk to your dentist before switching to any fluoride-free paste, including ours.
Fluoride-free toothpaste with hydroxyapatite
If you prefer to avoid fluoride, look for hydroxyapatite, the mineral your enamel is made of. In clinical trials, hydroxyapatite toothpaste performed about as well as fluoride toothpaste for preventing new decay in the general population (hydroxyapatite vs fluoride). It hasn't been studied as much in people with severe dry mouth specifically, which is one more reason to keep your dentist in the loop.
What I brush with every day
10% nano-hydroxyapatite, organic birch xylitol and 2% theobromine in a probiotic herbal ferment. No fluoride, SLS or glycerin.
Where our toothpaste fits
TranscenDental toothpaste is the fluoride-free option on that list. Against the checklist above:
- No SLS and no foaming detergents at all, including cocamidopropyl betaine
- 10% dual-particle nano-hydroxyapatite for enamel
- Organic birch xylitol as the second ingredient
- A moisture system: xylitol, minerals and betaine (TMG) all attract water, and hyaluronic acid, a humectant, helps hold that moisture in the mouth and on the gums
- Low abrasion, with no silica, peroxide, charcoal or alcohol
- No glycerin. We use a humectant, just not glycerin. Glycerin pastes always gave me a fuzzy-teeth feeling, and I don't think glycerin does the oral microbiome or enamel any favors. That's my view rather than settled science.
We haven't tested our formula specifically in people with dry mouth, so we won't claim it treats it. What we can tell you is what customers who wake up dry have told us:
"Im a mouth breather so by 2am I wake up with nasty gross mouth after using regular tooth paste. Even if it doesnt help my teeth remineralize.. it gets the gunk out and doesnt leave my mouth coated..."
Kawika D., TranscenDental toothpaste
One caveat: it has warm botanical spice from clove, cinnamon and ginger. Most people with dry mouth find it gentle because there's no detergent, but if your mouth burns easily, start with a small amount.
How to brush when your mouth is dry
- Sip water first so the paste spreads instead of dragging.
- Use a soft-bristled brush and a pea-sized amount.
- Brush gently for two minutes, including along the gumline.
- Spit, but don't rinse heavily, so the enamel-supporting ingredients stay on your teeth longer.
- Clean between your teeth once a day. Plaque builds up faster when saliva is low.
- Finish the night with a xylitol mint if you wake up dry. Let it dissolve slowly to get saliva going. Our Ora Flora mints have about 3 grams of organic birch xylitol each.
And see your dentist more often if dry mouth is a long-term problem. Catching decay early matters more when your saliva isn't doing its usual job.
Build the full routine: brush with TranscenDental toothpaste, clean between your teeth with plastic-free bamboo floss, and finish with an Ora Flora xylitol mint. All three come together in the Oral Care Trio, which saves $12.
Frequently asked questions
What is the best toothpaste for dry mouth?
One that's SLS-free, mild, low in abrasion and contains fluoride or hydroxyapatite to protect enamel. Betaine and xylitol are helpful extras. If you have severe dry mouth or new cavities, ask your dentist about prescription high-fluoride toothpaste.
Can toothpaste cause dry mouth?
Toothpaste doesn't usually cause dry mouth, but SLS, alcohol and strong flavors can irritate a mouth that's already dry and make it feel worse.
Is SLS bad for dry mouth?
SLS can irritate the lining of the mouth, and a dry mouth has less saliva to protect it, so many people with dry mouth feel better with an SLS-free toothpaste.
Does Biotène toothpaste have fluoride?
Yes. Biotène's dry mouth toothpastes contain fluoride, and the brand says its Fresh Mint Original is free of SLS.
Is fluoride-free toothpaste OK if I have dry mouth?
For many people, a fluoride-free toothpaste with hydroxyapatite is a reasonable choice. If your dry mouth is severe or you're getting cavities, talk to your dentist first, since prescription high-fluoride toothpaste is the standard recommendation for high-risk patients.
What is the best toothpaste for dry mouth and bad breath?
Dry mouth is one of the most common causes of morning breath, because bacteria thrive when saliva is low. A gentle SLS-free toothpaste, cleaning between your teeth, brushing your tongue and stimulating saliva with xylitol usually help more than a strongly flavored paste.
Should I rinse after brushing if I have dry mouth?
Spit out the excess but avoid rinsing heavily, so the protective ingredients stay on your teeth. If you want to rinse, use a little water or an alcohol-free rinse.
What I brush with every day
10% nano-hydroxyapatite, organic birch xylitol and 2% theobromine in a probiotic herbal ferment. No fluoride, SLS or glycerin.
