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Can you use human toothpaste on dogs? 3 reasons why the answer is “NO”

February 20, 2019 2 Comments

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Can you use human toothpaste in dogs? It’s a legitimate question. Many of the medications which veterinarians prescribe for dogs are human drugs and can be obtained from a human pharmacy. We share almost everything with our dogs, from our deepest thoughts to our pillows. And while we might draw the line at sharing our toothbrush, does it really matter if we share toothpaste? Turns out, the answer is yes. It matters. Do not use human toothpaste for your dog.

Human toothpaste poses a health hazard for dogs.

dog with toothbrush and toothpaste and title can you use human toothpaste on dogs

3 critical reasons why human toothpaste is dangerous for dogs

There are three components present in most human toothpastes that are toxic to dogs:

1. Fluoride

Fluoride, in high enough doses, is toxic to dogs. Human toothpaste is designed to be rinsed out of the mouth, not swallowed. Do you know how hard it is to convince a four-year-old not to swallow toothpaste, let alone a Labrador?

While acute fluoride toxicity is possible (a large dose of fluoride consumed at once), the more likely scenario is a chronic toxin exposure, where the fluoride ingestion from frequent use (over the course of months to years) eventually reaches toxic levels in the dog’s body.

The symptoms are considerably different in the two scenarios.

Signs of acute fluoride toxicity from a dog ingesting human toothpaste include:

  • drooling
  • nausea/vomiting
  • restlessness
  • fecal and urinary incontinence
  • weakness and even seizures.

Symptoms of chronic toxicity from a dog ingesting human toothpaste over time include:

  • discoloration and mottling to the teeth
  • intermittent limping. (Two of the strangest combinations of clinical signs I’ve ever written about in a dog health blog post!)

The bottom line is this:

Most human toothpaste contains fluoride in high enough concentrations to poison a dog who ingests it daily, given enough time.Click To Tweet

Even pet toothpaste may contain fluoride

Pet toothpaste, on the other hand, is formulated to be swallowed. However, you still need to check the label before purchase because there are doggie toothpastes on the market that contain fluoride. I can’t understand why, but I liken it to antlers sold as dog chews. I would consider both of these products dangerous for dogs, but sadly they remain on the market because of the law of supply and demand. People buy them.

Related: Are Antlers Good for Dogs to Chew on? Please “Chews” NO

2. Sodium Lauryl Sulfate (SLS)

Human toothpastes are designed to foam. Marketers must have deduced that we humans like a shock and awe experience in the bathroom. Thus, our hygiene products foam and froth.

To create the foaming action, manufacturers add a chemical called Sodium Lauryl Sulfate (SLS). SLS is present in soaps, shampoos, laundry detergents, and toothpastes. The U.S. Food and Drug Administration (FDA) regards SLS as safe for short term topical use (consumers disagree on this point), but no studies have been done to prove its safety if ingested.

In dogs, SLS can cause gastrointestinal upset if swallowed in sufficient quantities. Now you know “the rest of the story” on why pet toothpaste doesn’t foam, and another reason why “no” is always the answer to the question, “Can you use human toothpaste on a dog?”

3. Xylitol

You may have heard about xylitol, an increasingly common sugar substitute in human foods and hygiene products. Ironically, xylitol has been associated with preventing tooth decay in people, and is therefore added to toothpaste both because it is a sugar-free sweetener and because it may improve oral health.

I think it might surprise you to learn how prevalent this dangerous chemical is in toothpaste, including some well-known “holistic” brands such as Tom’s of Maine ®, Trader Joe’s ®, and Young Living™. For a comprehensive list of products containing xylitol, please refer to this article from Preventive Vet: Which Products Contain Xylitol? Here’s a List!

Sadly, xylitol is killing dogs. It can cause two problems for a dog’s system: low blood sugar and irreversible damage to the liver, both of which can be fatal.

Please get in the habit of checking the label for everything you give your dog and watch for xylitol in the ingredient list.

To learn more about the poison in your pantry, read my blog post: Xylitol and Dogs: Why Your Dog is Counting on You to Read This and remember that xylitol is a critical reason why we cannot use human toothpaste on dogs.

How valuable is dog toothpaste for your dog’s dental health?

girl brushing dogs teeth using toothbrush and dog toothpaste
Doggie toothpaste is used as a “treat” to encourage a positive experience.

Here’s the truth: the real benefit in routine home dental care isn’t from the toothpaste. It’s the physical act of brushing—the repetitive motion of the bristles scrubbing away food particles and plaque deposits in the mouth—that makes brushing your dog’s teeth so valuable.

When you take your car to the DIY car wash, is it the pink soap that cleans the dirt and debris from your car, or is it your elbow grease? Consistency and good technique are far more valuable than the animal-safe toothpaste you use. Brushing with plain water is reasonable.

Related: Should I Brush My Dog’s Teeth? 7 Toothbrushing Tips

So why do we even use pet toothpaste for dogs?

The manufacturers claim that pet toothpaste does help reduce plaque, but I don’t know of any scientific research that proves this. The real benefit of using dog toothpaste when brushing your dog’s teeth is the flavor. Supposedly, animals don’t like the taste of human toothpaste (mint), but veterinarian-recommended pet toothpaste comes in such decadent flavors as poultry, malt, beef, and seafood.

dog toothbrush with poultry-flavored dog toothpaste because human toothpaste is toxic to dogs
Poultry-flavored dog toothpaste makes brushing a happier experience for your dog.

Recently, one of my veterinary clients told me she was surprised by how much her dog liked the taste of the dog toothpaste. In fact, her dog seemed to enjoy having his teeth brushed because of it.

That’s the real advantage of doggie toothpaste—keeping the experience a positive one for your canine companion.

Finally, when someone asks you, “Can you use human toothpaste on dogs?” I hope that you’ll respond with an emphatic “No!” and explain the dangers of using human toothpaste. Kudos to anyone enthusiastic about brushing their dog’s teeth, but remember to read the label on over-the-counter pet toothpaste before use, or buy from your veterinarian to protect the health of your dog.

What questions do you have about brushing your dog’s teeth?

Please comment below.

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Reader Interactions

Comments

  1. Linda Brodowski says

    February 21, 2019 at 10:47 pm

    I’ve been brushing my dog’s teeth with Raw Extra Virgin Organic Coconut Oil for months now…it seems to work well plus he gets the added GI benefits that go along with using this. About 1/2 tsp does well on cleaning his teeth. He’s 10lbs anfd loves when I brush : )

    Reply
    • Julie Buzby says

      February 27, 2019 at 1:17 am

      My only concern with recommending that across the board is that I have heard of dogs getting pancreatitis from too much coconut oil (fat content) and it is high calorie. But I’m sure if used sparingly, as your describe, it makes sense. Thanks for the comment, Linda!

      Reply

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Dr. Julie Buzby has been an integrative veterinarian for twenty years and has earned certification by the American Veterinary Chiropractic Association in 1998, and by the International Veterinary Acupuncture Society in 2002.
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