10 Little-Known Arm and Hammer Toothpaste Side Effects

Did you know there are hidden arm and hammer toothpaste side effects? There are, indeed. 

It is said that Arm and Hammer’s toothpaste is safe to use daily. It has been used for decades, particularly for effective, low-abrasion oral care. 

Additionally, Arm and Hammer’s toothpaste was developed for daily oral hygiene. It does whiten teeth, but at a price that is not obvious.

It is simple to believe that brushing your teeth with Arm and Hammer toothpaste will ensure your oral health. And it can. 

However, did you know there may be underlying arm and hammer toothpaste side effects? You should know about the 10 little-known Arm and Hammer toothpaste side effects.

How Long Does Arm and Hammer Take to Whiten Teeth?

It takes up to six weeks to whiten teeth when used twice a day.

It removes surface stains from smoking or drinking coffee or soda.

However, it can’t remove stains that go deeper than the tooth’s surface.

Arm and Hammer Toothpaste contains peroxide for extra-whitening teeth without affecting the enamel.

It also contains fluoride to replenish the teeth, protect against cavities, and prevent tartar buildup.

The toothpaste also contains mint to enhance the flavor.

It’s formulated with baking soda to deep clean the gums and between the teeth. It also neutralizes harmful acids that can weaken enamel.

The manufacturer also states that the toothpaste is less abrasive than other whitening kinds of toothpaste.

Arm and Hammer Toothpaste Side Effects

#1. High Chances of Tooth Sensitivity.

The most common of Arm and Hammer toothpaste side effects is tooth sensitivity. When your teeth are exposed to cold or hot temperatures, they may become more sensitive. 

You will experience a brief, sharp shock of nerve pain in response to a hot, cold, sweet, or sour trigger. You’ll feel sensitivity in your teeth, especially when brushing, eating, or drinking. 

The brief, sharp pain typically affects multiple teeth or is sometimes restricted to a specific area or set of teeth.

#2. Results of Gum Sensitivity and Bleeding

Another Arm and Hammer toothpaste side effects are that it can irritate the gums. After some time using Arm and Hammer toothpaste, you may notice that your gums are becoming more sensitive.

The gums become prone to bleeding. 

You can reduce gum sensitivity by adding vitamin C to your diet. You can also drink more water.

Softer toothbrushes can also help reduce gum bleeding. If the toothpaste causes more bleeding, you should stop using it. If the gums keep bleeding, see your dentist as soon as possible.

#3. Causes a Dryer Mouth

Among Arm and Hammer toothpaste side effects, you may also experience a dryer mouth than usual. You might realize that your mouth feels dryer than normal.

Additionally, you may feel that your breath smells different. 

#4. Damages Your Mouth

One customer says, “It took me a while to put two and two together.” “The toothpaste always burned.”

“My mouth became sore, torn, and damaged over time, as did my lips.” “Until one day, after brushing my teeth, I realized the culprit.” 

After using the Arm and Hammer toothpaste, you may experience a swollen or bleeding mouth. Another client reports that her lips, gums, and under her tongue had doubled in size by the second week. 

Her entire mouth was covered in large red bumps. On the other hand, her husband has never had any problems with toothpaste.

As a result, you might develop blisters or mouth ulcers, among the Arm and Hammer toothpaste side effects.

#5. You May Experience a Burning Sensation.

Some users report experiencing a mild burning sensation after using Arm and Hammer toothpaste. One of the ingredients in the toothpaste is menthol with a peppermint flavor, which is responsible for this feeling. 

Therefore, you should expect a burning sensation among Arm and Hammer toothpaste side effects. Switching to an unflavored variety or trying another brand when the burning sensation persists is always recommended. 

You can also use less toothpaste unless you’re allergic to it.

#6. It Can Cause Allergic Reactions. 

An article from Crest Toothpaste says that severely cracked and dry lips are one toothpaste allergy symptom to be aware of. The condition is known as cheilitis, which is the most common allergic reaction to toothpaste. 

Some possible symptoms of toothpaste allergies are a rash around the mouth, chapped lips, and an uncomfortable or burning sensation.

Thus, you may experience an allergic reaction which is another Arm and Hammer toothpaste side effect. 

The allergies can manifest in hives, swelling, or difficulty breathing. One user says he noticed her mouth burning and swelling and couldn’t even whistle. 

He was later told that he was allergic to sodium lauryl sulfate in Arm and Hammer toothpaste. He stopped using the toothpaste and switched to Colgate; shortly after, the symptoms disappeared. 

Thus advisable to constantly check on any toothpaste ingredients before purchase to find out any ingredient that may cause allergic reactions.

#7. Possibility of Harmful Chemicals.

Arm and Hammer toothpaste contains harmful chemicals that can seep into your bloodstream through your skin. Some of the Arm and Hammer ingredients are Sodium Bicarbonate which belongs to the antacid group. 

It’s advisable to keep it away from children’s reach. Young children up to 6 are not advised to take antacids unless a doctor has prescribed them. 

You should therefore be careful when using it. As per the Arm and Hammer brand, toothpaste is an excellent choice and recommended for children over 2 years old.

#8. It Can Cause Nausea and Vomiting.

Using Arm and Hammer toothpaste can upset your stomach, which later causes nausea and vomiting. These arm and hammer side effects are primarily felt if you mistakenly slow the toothpaste. 

Additionally, it can cause heartburn to other users. This will make you feel like you want to vomit everything out.

According to an article by New York Times, most toothpaste, including Arm and Hammer, contains a small amount of fluoride. 

Fluoride causes vomiting, especially when taken in large doses. Combined with gastric juices, it can irritate the stomach and intestines, making you feel nauseous or even vomit.

#9. Possibility to Interact With Other Medications

Arm and Hammer toothpaste can interact with other medications you may be taking. Some of the medicines may cause some risks when taken together. 

You should always consult your doctor and inform them of other medicines you’re using before using the toothpaste.

#10. Increases the Risk of Cavity

Arm and Hammer toothpaste can increase cavity risk over time. The sugar content can increase your cavity risk. 

It is always best to look for a sugar-free alternative or speak with your dentist about other options available today. 


The best way to stay o the safe side is always to keep these 10 little-known Arm and Hammer toothpaste side effects in mind whenever you decide to use them.

It’s essential to know the side effects of a product when deciding which product is right for you. 

Discuss any potential side effects with your dentist before making any changes to your oral health routine. Together you can decide what’s best for your unique needs — both now and in the long run!

Therefore, if you experience any of these arm and hammer toothpaste side effects, it is important to discontinue its use. Then the next step is to consult with your dentist or physician.

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