Is glycerin bad for teeth?

No, glycerin is not inherently bad for teeth.

Widely found in personal care products, glycerin is anti-microbial and included in toothpaste as a safe and affordable preservative.

At the same time, glycerin functions like an occlusive and may leave a film on your teeth. This film can prevent the remineralizing agents in the toothpaste from getting into your enamel. Over time, this process could potentially exacerbate tooth decay and cavities.

That being said, there is no conclusive evidence that glycerin is bad for your oral health or contributes to conditions like gum disease, bad breath, or dry mouths.

This article will explain everything you need to know about glycerin, its impact on your teeth, and the benefits of glycerin free toothpaste.

What is glycerin?

Also known as glycerol, glycerin is naturally occurring sugar alcohol.

Vegetable glycerin is an odorless liquid that is commonly used in the food industry thanks its sweet taste and anti-caking effects.

Further, it is found in oral care, skincare, and other personal care products thanks to its ability to prevent the growth of bad bacteria and water-binding properties.

Glycerin is generally well-tolerated through both topical and oral consumption and has been approved by the United States FDA for both.

What is glycerin used for?

Also known as glycerol, glycerin is a popular ingredient in industries like:

  • Food production: as an anti-caking agent, thickener, and sweeter

  • Oral care: as a preservative and antimicrobial agent

  • Skincare: as a humectant to improve skin hydration

Glycerin is generally safe for consumption, although certain people may be more sensitive to it.

For these individuals, side effects can include discomfort and gastrointestinal distress.

Food Production

As glycerin is safe to consume, it is a common agent used in food production as a sugar substitute and to thicken drinks.

Additionally, thanks to its moisture attracting properties, glycerin is added to food to reduce caking and to prevent food from drying out.

Oral Care

Glycerin is often added to toothpaste because it:

  • Fights dry mouth

  • Reduces bacteria buildup

  • Keeps toothpaste from drying out

It is a safe and popular preservative and does not prevent tooth remineralization.


In the leagues of ingredients like hyaluronic acid and panthenol, glycerin is an effective humectant used to improve your skin's natural moisture barrier.

Glycerin works by attracting and binding to environmental water molecules. This has a number of cosmetic and health benefits such as:

  • Speeds up would healing

  • Improves skin barrier function

  • Reduces rates of transepidermal water loss

  • Provides a temporary plumping effect on skin

Further, glycerin is unlikely to cause allergies and effectively fights skin conditions such as irritation.

Why does glycerin toothpaste exist?

Glycerin is a preservative and commonly included in toothpaste to keep it from drying out.

Further, glycerin inhibits bad bacteria growth in toothpaste and can protect you from oral disease due to bacteria buildup.

Is glycerin in toothpaste bad?

While not inherently harmful, if glycerin leaves a film over your tooth enamel which prevents your teeth from absorbing the active ingredients in your toothpaste.

That being said, glycerin is sometimes essential to the viscosity and formulation of toothpaste and cannot be removed.

Why is glycerin bad for your teeth?

Active ingredients like nano hydroxyapatite and fluoride are included in toothpaste to stimulate the remineralization process.

If glycerin creates an occlusive coating over your teeth, this might inhibit remineralization from occurring.

Overall, glycerin is not inherently bad for your teeth, but it might be harmful to individuals in need of remineralization, such as those dealing with:

  • Cavities

  • Tooth decay

  • Hypersensitivity

Individuals that need especially need remineralizing benefits from toothpaste should consider switching to a glycerin free, non toxic toothpaste.

The Best Glycerin Free Toothpaste

NOBS is a fluoride free, nano hydroxyapatite toothpaste without glycerin.

Because NOBS are dehydrated, natural toothpaste tablets, they don't require water or many preservatives to prevent bad bacteria growth. Therefore, NOBS do not include glycerin in the formula to function correctly.

While glycerin has not been proven to disrupt your oral microbiome, it could prevent nano hydroxyapatite from remineralizing enamel.

Thus, individuals at greater risk for hypersensitivity and cavities should consider switching over.

Frequently Asked Questions

What does glycerine do for teeth?
Glycerin in toothpaste prevents the growth of bad bacteria from spreading around your mouth from your toothpaste. At the same time, glycerin toothpastes have the potential to leave a coating on your teeth that may not come off when you brush. This glycerin coating can prevent the active ingredients in your toothpaste from getting to your enamel and lead to oral disease.

Is glycerin in toothpaste bad for your teeth?
While not inherently harmful, glycerin leaves a film over your tooth enamel which prevents your teeth from absorbing the active ingredients in your toothpaste. Over time, this can be harmful to individuals in need of remineralization, such as those dealing with cavities and hypersensitivity.

How does glycerin affect the mouth?
Glycerin serves as a calming agent that lubricates the mucous tissue in the oral cavity, acting as a replacement for saliva. It's important to note that glycerin does not induce the secretion of saliva.

Does glycerin aid in teeth whitening?
Yes, glycerin is included in teeth-whitening products to accelerate the removal of moisture from the enamel. This facilitates the penetration of the whitening product to reach stains beneath the tooth's surface. Additionally, glycerin is present in teeth-whitening products to extend their shelf life.

What is nano-hydroxyapatite toothpaste?
Nano hydroxyapatite toothpaste, such as NOBS Toothpaste Tablets, is a fluoride-free toothpaste that uses nano hydroxyapatite as a key ingredient. It aims to stimulate the remineralization process and does not contain glycerin, making it suitable for individuals at risk for hypersensitivity and cavities.

NOBS Toothpaste Tablets
NOBS Toothpaste Tablets
NOBS Toothpaste Tablets
NOBS Toothpaste Tablets
NOBS Toothpaste Tablets
NOBS Toothpaste Tablets
NOBS Toothpaste Tablets
NOBS Toothpaste Tablets
NOBS Toothpaste Tablets

NOBS Toothpaste Tablets

Regular price$40
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NOBS is everything toothpaste should be - all the good stuff, and none of the junk.

Fluoride Free
Never any fluoride, and no harsh abrasives.

We used the magical remineralizing power of 5% nano-hydroxyapatite to protect your teeth long-term. It's the safest alternative to fluoride!

Unlike messy tube toothpaste, NOBS are easy to store and use anywhere.

Thanks to our unique blend of natural ingredients, NOBS will make your breath as fresh as you look. Instead of gross sweeteners that cover up a natural slightly bitter aftertaste, our organic mint will leave you so kissable. Trust us, your date will thank you.

Cleans Effectively Without Damaging Enamel

With an enviable RDA of 21.38, NOBS Toothpaste Tablets are intentionally designed to help you gently buff out surface stains and break up plaque biofilm without causing damage to your enamel. Thanks, baking soda!

Flex on TSA

NOBS toothpaste tablets don’t apply to the 3.4oz limit. Fly with confidence that you won’t be condemned to a dirty mouth while you travel.

No Mess

Never worry about your toothpaste tube exploding over your other toiletries. NOBS toothpaste tablets come in an air-tight glass jar, free of plastic and without the mess. Unscrew, chew, and renew your mouth.

No Plastic

We want you to disrupt your brushing routine, not your endocrine system. Unlike other brands, our product is free of all plastics and BPAs.

Perfect Size

NOBS toothpaste tablets are individual and perfectly dosed. No more squeezing, no more tube sliding against the edge of your sink and definitely no wasted toothpaste.

Safe for Children

Protecting little ones is our top priority. NOBS provides the safest oral care for pregnant women and their families. Just monitor and ensure that your child can chew and swallow safely before introducing them to NOBS.

This product is not suitable for pets. Humans only, please!

While xylitol is great for supporting the human oral microbiome, it can be toxic to pets. Please keep NOBS away from your furry friends, and contact your veterinarian immediately if consumed by your pet.

Fluoride Free Toothpaste Tablets