Your Toothpaste Says It Heals Gums. Lawsuits Say a Common Ingredient Irritates Them.

The short version: In July 2026, groups of consumers filed three separate proposed class actions in the U.S. District Court for the Southern District of California. One targets Procter & Gamble, the maker of Crest Pro-Health; one targets Haleon US, maker of Sensodyne and Parodontax; and one targets Colgate-Palmolive, maker of the Colgate Total line. The common thread is a single ingredient: sodium lauryl sulfate, better known as SLS. The suits allege that these companies sell the toothpastes on gum-health promises — reversing early gum disease, strengthening gums, reducing swollen and bleeding gums — while including an ingredient the complaints describe as a harsh detergent and known irritant that can, they allege, damage the very tissue the products claim to help.

Every one of those points is an allegation a court has not ruled on. And this story comes with an unusually important asterisk that a lot of coverage skips: SLS is not some obscure or banned chemical. It is one of the most common ingredients in oral care, it has been used for decades, and mainstream dental guidance generally treats it as safe at the concentrations found in toothpaste. So the interesting question isn’t “is there poison in your toothpaste” — there isn’t — it’s whether marketing a product specifically for gum healing squares with including an ingredient plaintiffs say can irritate gums. Let’s take it apart.

What Sodium Lauryl Sulfate Actually Is

Start with the ingredient, because the whole case turns on it. Sodium lauryl sulfate is a surfactant — a detergent-like compound that lowers surface tension, which is a technical way of saying it makes foam and helps things spread and rinse. It’s the reason toothpaste lathers up in your mouth. That same property is why you’ll find SLS (or close cousins) in shampoo, body wash, dish soap, and countless other products. In toothpaste, it helps distribute the paste, loosen debris, and give the “clean” foaming sensation most people associate with brushing.

None of that is secret or new. SLS has been used in consumer products for the better part of a century, it appears on the ingredient label, and it is permitted by regulators for use in these products. That context matters, because it frames what the lawsuits are — and aren’t — claiming.

What the Lawsuits Allege

According to the complaints, the toothpastes are advertised with gum-focused promises — language along the lines of reversing gingivitis, strengthening gums, reducing swollen or bleeding gums, and helping gums return to a healthier condition. The suits allege that SLS is a “harsh detergent and known irritant” that, even in low concentrations, can:

• Damage cells in the lining of the mouth and cause epithelial sloughing (the peeling of thin patches of tissue some people notice after brushing);
• Trigger inflammation and slow or inhibit wound healing;
• Provoke allergic or contact-sensitivity reactions; and
• Disrupt the mouth’s microbiome — the balance of bacteria that live there.

The named plaintiffs say they experienced problems consistent with those descriptions — pain, discomfort, sensitivity, and in at least one case bleeding gums — after regular use. From those allegations, the suits build a consumer-protection case rather than a personal-injury one: they claim the gum-health marketing is deceptive because a reasonable shopper wouldn’t expect a “gum health” product to contain an ingredient the plaintiffs say works against gum tissue, and that shoppers paid for — or paid a premium for — a benefit they allege wasn’t delivered.

The Legal Theory, in Plain English

All three suits lean on California’s consumer-protection statutes — the Unfair Competition Law, the False Advertising Law, and the Consumers Legal Remedies Act — along with breach-of-warranty claims, and each demands a jury trial. Those laws share a common idea: a company can’t make claims about a product that are likely to mislead an ordinary consumer. You don’t have to prove someone was poisoned to bring this kind of case; you have to convince a court that the labeling and advertising created a false impression that mattered to a buyer’s decision.

The proposed classes are defined broadly — generally, California consumers who bought the specified products for personal use over roughly the past four years. As for what the suits ask the court to do: they seek to have the cases certified as class actions, to stop or correct the challenged advertising, and to require the companies to give up money tied to the sales and reimburse purchasers. Those are requests, not results — a court has granted none of them, and, importantly, there is no settlement and nothing to claim. We say that plainly because these labeling cases routinely get shared online as if a check is waiting; it isn’t.

The Honest Counterpoint

There’s one place where the two sides genuinely meet, and it’s worth stating because it’s the most useful takeaway for readers. It is well documented that some people who suffer recurrent canker sores (aphthous ulcers) report fewer or milder sores when they switch to an SLS-free toothpaste. That’s a real, if specific, sensitivity — and it gives the plaintiffs’ theory something to stand on. But a documented sensitivity in some people is not the same as proof that a mass-market product is unsafe or that its labeling is deceptive to the average buyer. Bridging that gap is the plaintiffs’ job, and it won’t be easy.

What You Can Actually Do Right Now

Because there’s no recall and no claim form, the practical steps here are about information, not paperwork:

• Read your own label. If you want to avoid SLS, look for it (or “sodium lauryl sulfate”) in the ingredient list. Plenty of mainstream and specialty toothpastes are marketed as SLS-free, and switching is easy and inexpensive.
• Talk to your dentist about symptoms. Persistent mouth sores, peeling tissue, or bleeding gums deserve a professional look — they can have many causes, and only an exam can sort out whether an ingredient sensitivity, gingivitis, or something else is driving it. This article is not medical advice.
• Don’t stop caring for your gums. Whatever you think of the marketing, brushing, flossing, and fluoride still matter. If SLS bothers you, switch products — don’t stop brushing.
• Be skeptical of “claim your money” posts. There is no settlement here. Any site telling you to submit bank details to “claim” a toothpaste payout right now is a red flag.

Why This One Is Worth Watching

These cases sit in a fast-growing corner of consumer law: challenges to the gap between a product’s health-benefit marketing and what’s actually inside. We’ve tracked the same pattern in a class action over whether Gatorade’s “hydrates better than water” claim holds up, and in litigation accusing major brands of engineering foods that are hard to stop eating. Toothpaste is a near-universal product — almost everyone uses it, twice a day — so if courts decide the gum-health messaging on these specific lines crosses the line into deception, the ripple effects across the oral-care aisle could be large. If they decide a disclosed, long-approved ingredient plus real active benefits isn’t deceptive, that will matter too.

Where the Law Comes In

Lawsuit Loop follows cases like this because they sit where everyday spending meets consumer protection. When a company is alleged to have promised a health benefit while including something that allegedly undercuts it, one of the questions the law asks is whether shoppers were misled — and class actions are one of the main tools for testing that question at scale. Whether any particular person has a claim depends entirely on the specific facts, on which product and marketing they relied on, and on how the courts resolve the deception question — and nothing here is a prediction that any case will succeed or a promise of any outcome. If you used one of these toothpastes for gum health and want to understand your options, you can speak with a lawyer or use the free form on this page. We’ll update this article as the cases develop.