Natural Toothpaste Without SLS: How to Read Labels & Choose

Updated 6 November 2026 · Standard formula, shown below

To choose a natural toothpaste without sodium lauryl sulfate (SLS), you must read the ingredient list and look for the words “sodium lauryl sulfate” or “SLS” — even on products labeled “natural.” You also need to check for other harsh detergents and confirm that the fluoride source (if any) is one you accept. This article explains what SLS is, why some people avoid it, and how to decode the label so you pick a formula that matches your needs.

What Is SLS and Why Is It in Toothpaste?

Sodium lauryl sulfate is a surfactant, a compound that lowers the surface tension of water. In toothpaste, it creates the foam that most people associate with cleaning. The foam helps spread the paste around the mouth and can give a feeling of freshness. SLS is cheap and effective, which is why it appears in the vast majority of conventional toothpastes, as well as in shampoos, body washes, and dish soaps.

However, SLS is a strong detergent. For some individuals, it can irritate the oral mucosa, leading to canker sores, dry mouth, or a burning sensation. Research on the link between SLS and canker sores is mixed, but many dentists report that patients with recurrent aphthous ulcers see improvement when they switch to an SLS-free toothpaste. The goal of an SLS-free formula is to clean teeth without that harsh foaming agent, often using gentler plant-derived surfactants or no foaming agent at all.

How to Read a Toothpaste Label for SLS

The ingredient list on a toothpaste tube is required by law in most countries to list ingredients in descending order of concentration. Here is what to look for:

Check the full list: SLS may appear as “sodium lauryl sulfate,” “SLS,” or rarely as “sodium dodecyl sulfate.” Some products list it as “sodium laurilsulfate” (the INCI name). If you see any of these, the product contains SLS.
Look for “SLS-free” claims: Many brands put this on the front label, but always verify by reading the back. A product can claim “natural” and still contain SLS.
Watch for other sulfates: Sodium laureth sulfate (SLES) is a similar detergent, often used as a gentler alternative, but it can still cause irritation in sensitive mouths. If you want to avoid all sulfates, check for “sodium laureth sulfate” and “sodium lauryl sulfate.”
Identify the cleaning agent: In SLS-free toothpastes, the foaming and cleaning may come from cocamidopropyl betaine (derived from coconut), sodium cocoyl glutamate, or decyl glucoside. These are milder and less likely to irritate.

How to Choose the Right SLS-Free Toothpaste for You

Choosing a toothpaste involves matching the formula to your oral health needs. Here are the key factors to weigh:

Decide on fluoride or not: If you are prone to cavities, choose a toothpaste with fluoride (or nHAp). If you prefer fluoride-free, make sure you get enough fluoride from other sources (like water) and discuss with your dentist.
Consider your sensitivity: If you have sensitive teeth, look for a toothpaste with potassium nitrate or stannous fluoride, which help block nerve signals. These are not exclusive to natural brands, but some natural formulas include them.
Check for your allergens: Some natural toothpastes contain coconut-derived ingredients (like cocamidopropyl betaine) or essential oils that can cause allergies. Read labels carefully if you have known sensitivities.
Look for the ADA Seal (if you want it): The American Dental Association (ADA) Seal of Acceptance is only given to toothpastes that meet safety and efficacy criteria. Not all natural toothpastes have it, but some do. If you want independent verification, check for the seal.
Try a small size first: Since taste and texture vary widely, buy a travel size or a single tube before committing to a large one.

Common Misconceptions About SLS-Free Toothpaste

There are several myths about SLS-free toothpaste. Here are the facts:

Myth: SLS is toxic. SLS is safe in the concentrations used in toothpaste. The concern is irritation, not toxicity. The FDA and other health agencies allow it, but that does not mean it is right for everyone.
Myth: No foam means no cleaning. Foam is not necessary for cleaning. The abrasives and surfactants do the work, and some people actually prefer a low-foam paste because it is less messy.
Myth: All natural toothpastes are SLS-free. Some brands that market themselves as “natural” still include SLS. Always read the ingredient list.
Myth: SLS-free toothpastes do not fight cavities. They can, if they contain fluoride or nHAp. Without those, they may not offer the same cavity protection, so choose accordingly.

Cost and Availability of SLS-Free Toothpastes

SLS-free toothpastes are widely available in drugstores, health food stores, and online. They often cost more than conventional brands, sometimes double or triple the price per ounce. The price difference reflects the use of more expensive plant-derived surfactants, natural flavors, and smaller production runs. However, you can find affordable options from store brands that are SLS-free, especially if you compare unit prices. Buying in bulk or on sale can reduce the cost.

Safety and Effectiveness: What the Evidence Says

SLS-free toothpastes are generally safe for daily use. They clean teeth and can help reduce irritation for people with sensitive mouths. However, the most important factor in cavity prevention is fluoride. If you choose an SLS-free toothpaste without fluoride, you may be missing that protection. The American Dental Association recommends brushing twice a day with a fluoride toothpaste, but it also acknowledges that some people may prefer alternatives. If you have a history of cavities, talk to your dentist before switching to a fluoride-free formula.

For people with canker sores, switching to an SLS-free toothpaste may reduce the frequency and severity of outbreaks, though the evidence is not conclusive. Some studies have shown a reduction, while others have not. It is a low-risk change to try, but you should not expect it to cure the condition.

Frequently Asked Questions

Does SLS-free toothpaste foam?

Some SLS-free toothpastes foam, but less than those with SLS. They often use milder surfactants like cocamidopropyl betaine or decyl glucoside that produce a light foam. Others have no foaming agent at all, so they do not foam. The amount of foam does not affect cleaning effectiveness.

Can SLS-free toothpaste cause cavities?

Not by itself. Cavities are caused by plaque acids, not by the toothpaste. However, if you choose an SLS-free toothpaste without fluoride or nHAp, you lose the remineralizing benefit that helps prevent cavities. If you are cavity-prone, look for an SLS-free formula that still contains fluoride or nHAp.

Is SLS-free toothpaste better for canker sores?

Some people find that switching to SLS-free toothpaste reduces the number of canker sores they get. The evidence is mixed, but it is a reasonable thing to try if you suffer from frequent canker sores. The change is harmless and may help.

What is the difference between SLS and SLES?

SLS (sodium lauryl sulfate) and SLES (sodium laureth sulfate) are both surfactants. SLES is often considered gentler because it is less irritating, but it can still cause sensitivity in some people. Both are synthetic detergents. If you want to avoid all sulfates, check for both names on the label.

Can I make my own SLS-free toothpaste?

Yes, you can make a simple paste with baking soda and coconut oil, but it will not contain fluoride, and it may be abrasive if you use too much baking soda. Homemade toothpastes do not have the cavity-fighting benefits of commercial ones, and they may not have a pleasant taste. If you make your own, do not expect it to prevent cavities.

How do I know if a toothpaste is truly natural?

There is no legal definition of “natural” on toothpaste labels. The best way is to read the full ingredient list and look for recognizable plant-based ingredients and the absence of synthetic dyes, artificial sweeteners, and harsh detergents like SLS. Also check for certifications from organizations like the Natural Products Association, though these are voluntary.

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