You may have noticed that more and more of your patients have started seeking toothpastes that are free of Sodium Lauryl Sulfate (SLS). Why has this become a trend, and what are your patients’ concerns? Here’s what you need to know.
What Is SLS?
Sodium lauryl sulfate (SLS) is a surfactant commonly used as a foaming agent in oral care products such as toothpastes and mouthwashes. Surfactants lower surface tension, allowing ingredients to spread more easily and interact with debris on tooth surfaces and oral tissues.
Because SLS creates a rich foam, many people assume that the foam itself enhances the product’s cleaning power. In reality, foam is largely a sensory byproduct of the surfactant’s action and does not directly improve cleansing efficacy. Debris removal is driven by the surfactant’s ability to interact with and lift particles, not by the foam itself.
In the United States, SLS is permitted for use in oral care products and is regulated by the U.S. Food and Drug Administration (FDA) under cosmetic and over-the-counter drug guidelines, depending on the product classification. When used at approved concentrations (typically 1-3%), SLS is considered safe for the general population. However, some individuals may experience irritation or sensitivity, particularly those with recurrent aphthous ulcers or mucosal sensitivity.
How Can SLS Affect Patients?
Many dental patients prefer products containing SLS because they associate foaming with cleanliness. They may also appreciate the familiar taste and the typically lower cost of SLS-containing formulations.
Studies have shown, however, that some patients have negative reactions to brushing with a toothpaste formulated with SLS. These effects have included oral lesions1, inflammatory reactions of the anterior dorsal tongue2, and oral mucosal desquamation3, or the peeling of the mouth’s lining. Especially for patients who are prone to mouth or tooth sensitivity, SLS products can exacerbate oral health issues rather than improve them.
Alternatives for Sensitive Patients
SLS remains an effective and FDA-approved surfactant that performs well in many toothpaste formulations. For patients without a history of mucosal sensitivity, aphthous ulcers, xerostomia, or irritation, an SLS-containing toothpaste may be perfectly appropriate and cost-effective. The presence of foam can also enhance patient satisfaction and perceived cleanliness, which may positively influence brushing compliance.
However, for patients who report recurrent canker sores, burning sensations, tissue sloughing, or generalized oral sensitivity, recommending an SLS-free formulation may be a simple and impactful modification. In these cases, reducing potential irritants can improve comfort and support long-term adherence to oral hygiene routines.
Ultimately, the decision should be patient-specific. Understanding both the functional role of SLS and the growing consumer preference for gentler formulations allows dental professionals to guide recommendations based on individual risk factors, clinical presentation, and patient comfort rather than marketing trends alone.
Many of the leading manufacturers of dental products make SLS-free formulas, which are often marketed for sensitive patients. TheraBreath™ Sensitive Toothpaste falls into this category, and follows the company’s philosophy of using intentionally sourced, effective ingredients. Its active ingredients are potassium nitrate 5% and sodium fluoride 0.24% (0.16% w/v fluoride ion), for caries prevention.
Sensitive Toothpaste uses several inactive ingredients, including Sodium Methyl Cocoyl Taurate, a gentle surfactant derived from coconuts, and sodium bicarbonate, commonly called baking soda. The formula whitens sensitive teeth without harsh abrasives. Patients can also enjoy long-lasting fresh breath.
Reviews of the Sensitive Toothpaste formula say it’s enjoyable and effective:
“As a dental hygienist I love to try new products to be able to recommend to my patients when needed. I have received this product at the right time. My husband was having sensitivity on a tooth, and I let him try this toothpaste. After two days of use, sensitivity went away. Definitely fast action!”
“The TheraBreath™ Sensitive Toothpaste has a great texture and taste. There’s no bad aftertaste and it felt gentle. It also didn’t cause dry mouth after like some other toothpastes I’ve tried before.”
“I can’t use a lot of toothpastes because I am allergic to SLS. The issue with a lot of SLS-free toothpastes is that they just aren’t very minty and don’t feel fresh. This toothpaste is SLS-free and has that fresh minty taste that I love.”
Sensitive Toothpaste is the latest addition to the TheraBreath™ line of dentist-formulated toothpastes for every patient need, from caries prevention and gum health to fresh breath and whitening. Each formula contains no alcohol, parabens, dyes, andsulfates. Patients’ dietary preferences are also taken into consideration, as all TheraBreath™ formulas are certified vegan, kosher, and halal.
Register your office to get your free sample of TheraBreath™ Sensitive Toothpaste at orders.hygienesquad.com
- Weiger R, Netuschil L, von Ohle C, Brecx M. Microbial vitality of supragingival dental plaque during initial stages of experimental gingivitis in humans. J Periodontal Res. 1995; 30: 204–209. doi: 10.1111/j.1600-0765.1995.tb01275.x
- Steinberg D, Bachrach G, Gedalia I, Abu-Ata S, Rozen R. Effects of various antiplaque agents on fructosyltransferase activity in solution and immobilized onto hydroxyapatite. Eur J Oral Sci. 2002; Oct;110(5):374-9. doi: 10.1034/j.1600-0722.2002.21303.x
- Bowden GH, Hamilton IR. Survival of oral bacteria. Crit Rev Oral Biol Med. 1998;9(1):54–85. doi: 10.1177/10454411980090010401