Arm and Hammer cat toothpaste is generally safe for cats. It’s formulated specifically for pets, meaning it avoids the two ingredients in human toothpaste that are genuinely dangerous to cats: fluoride and xylitol (an artificial sweetener). Since cats swallow toothpaste rather than spit it out, this distinction matters. The product uses an enzymatic formula with baking soda, and while it’s not without minor risks, it’s designed to be swallowed without harm at normal brushing amounts.
What’s in It and How It Works
Arm and Hammer’s cat toothpaste relies on an enzymatic system rather than the abrasive scrubbing action of human toothpaste. The key enzymes, glucose oxidase and amyloglucosidase, work together to boost hydrogen peroxide production in your cat’s saliva. That hydrogen peroxide then powers the lactoperoxidase system, a natural antimicrobial defense already present in saliva, which produces a compound that kills bacteria linked to gum disease and tooth decay.
The formula also contains baking soda (sodium bicarbonate), the brand’s signature ingredient. In the small amounts present in a pea-sized dose of toothpaste, baking soda acts as a mild abrasive and helps neutralize acids produced by oral bacteria. It’s not present in quantities anywhere near what would cause a problem for your cat.
The Baking Soda Question
Baking soda is technically toxic to cats, but only at doses far beyond what toothpaste delivers. According to the American College of Veterinary Pharmacists, toxicity signs like vomiting, tremors, or lethargy appear at ingestion of roughly 2 to 4 teaspoons per kilogram of body weight. For an average 4.5 kg (10-pound) cat, that’s 9 to 18 teaspoons of pure baking soda, an amount no cat would encounter through tooth brushing. A typical brushing uses a small smear of paste, which contains only a fraction of a gram of sodium bicarbonate. You’d need to let your cat eat entire tubes of toothpaste to approach a concerning dose.
What About Sorbitol and Other Inactive Ingredients
Most pet toothpastes, including Arm and Hammer’s, contain sorbitol as a sweetener and texture agent. Sorbitol is non-toxic to cats at the doses used in toothpaste, but it can cause mild digestive upset in sensitive animals. Because cats can’t fully digest sorbitol, it draws water into the large intestine. In small amounts this is harmless, but a cat that somehow ingests a large quantity could develop gas, soft stools, or diarrhea. At normal brushing doses, this is unlikely to be a problem. If your cat does get loose stools after brushing, it may simply be sensitive to sorbitol, and switching to a different enzymatic paste could help.
No VOHC Seal of Acceptance
One thing worth knowing: Arm and Hammer cat toothpaste does not carry the Veterinary Oral Health Council (VOHC) seal. The VOHC is an independent organization that tests dental products and awards its seal only to those that meet specific standards for reducing plaque or tartar. Not having the seal doesn’t mean the product is unsafe or useless. It means the company either hasn’t submitted the product for evaluation or the product didn’t meet the VOHC’s efficacy thresholds. If proven plaque reduction matters to you, check the VOHC’s current list of accepted cat products for alternatives that carry the seal.
Safe Brushing Practices
The American Animal Hospital Association recommends starting dental care during a cat’s initial kitten visits, and there’s no strict minimum age for using enzymatic toothpaste. The goal early on is getting your kitten comfortable with mouth handling. Using a small amount of flavored toothpaste as a reward during these sessions helps build a positive association. For adult cats, use a pea-sized amount or less on a finger brush or soft pet toothbrush. More paste doesn’t mean cleaner teeth, and keeping the amount small minimizes any chance of digestive irritation from swallowed ingredients.
A few things to avoid regardless of which pet toothpaste you use: never substitute human toothpaste, which contains fluoride concentrations that can damage a cat’s kidneys over time. Avoid any product listing alcohol, artificial sweeteners like xylitol, or foaming agents. Even in small amounts, these ingredients are harmful to cats. If a toothpaste doesn’t explicitly say it’s formulated for pets, don’t use it.
Signs Something Isn’t Right
If your cat drools excessively, vomits, or refuses food after brushing, stop using the toothpaste and observe. Occasional mild gagging during brushing is normal, especially for cats still getting used to the process. Persistent vomiting or diarrhea after multiple brushing sessions, though, suggests your cat may be reacting to an ingredient. Switching brands usually resolves the issue. Cats with existing kidney disease or those on sodium-restricted diets should use baking soda-free alternatives, since even small additional sodium loads can be worth avoiding in those cases.