Does Mouthwash Break a Fast?

Mouthwash is often seen as a necessary part of oral hygiene, but what about when you’re fasting? Does mouthwash break a fast?

The answer may surprise you. In this blog post, we will explore the effects of mouthwash on fasting and provide tips for keeping your fast intact.

What Is In the Mouthwash?

There are many ingredients in mouthwash, but the main ones are sugar alcohol (sorbitol) and fluoride.

Alcohol is a disinfectant that helps kill the germs that cause bad breath and gum disease. It also helps to reduce plaque build-up on teeth.

Fluoride is a mineral that helps to protect teeth from cavities and decay. Both of these ingredients can affect a fast in different ways.

What Ingredients In Mouthwash Could Break a Fast?

Alcohol is the main ingredient that could break a fast. Even though it is only present in small amounts, alcohol can still cause your blood sugar levels to rise. This could lead to an interruption in the fasting process and thus invalidate the fast.

Fluoride may also be problematic if you are concerned about breaking your fast.

Does mouthwash break intermittent fasting?

Although it does not directly cause an increase in blood sugar levels, it can still affect the absorption of nutrients by the body.

This could lead to a lack of energy and hunger pangs, which could make it hard to stay on track with your fasting regime.

Does Using Mouthwash Break Your Fast?

Yes, it is true that mouthwash can break a fast. Mouthwash is used to clean the teeth and gums, and it contains ingredients like alcohol and sugar that can interrupt the fasting process.

That said, it’s important to note that using mouthwash for a brief period of time (e.g., 30 seconds) probably won’t have a significant impact on your fasting progress.

However, if you use mouthwash for an extended period of time (e.g., 5 minutes), then it’s likely that you will end up breaking your fast.

Will mouthwash break a fast?

If you’re trying to observe a prolonged fast, then it’s best to avoid using mouthwash altogether.

Instead, try brushing your teeth with water or a natural toothpaste and flossing with an unflavored dental floss. This will help to keep your fast intact without causing any interruptions.

Will Mouthwash Spike Insulin?

There is some evidence that mouthwash may spike insulin levels, but more research is needed to confirm this. It’s important to keep in mind that most types of mouthwash contain sugar or other sweeteners, which can contribute to high blood sugar levels and increase the risk of developing type 2 diabetes.

If you’re concerned about anything that would affect your blood sugar levels, it’s best to avoid mouthwash altogether and stick to water instead. You can also use a toothbrush and toothpaste to clean your teeth and gums.

Does Mouthwash Take You Out Of Ketosis?

Mouthwash doesn’t take you out of ketosis, but it can interfere with the ketone measurements if you’re using a ketone meter.

Most mouthwashes are high in sugar and will raise your blood sugar levels. If you’re trying to stay in ketosis, it’s best to avoid mouthwashes that contain sugar.

There are some sugar-free mouthwashes available that are safe to use.

Will Mouthwash Break Intermittent Fasting?

No, mouthwash won’t break intermittent fasting. In fact, there are plenty of ways to reduce bad breath without breaking your fast.

Brushing your teeth and tongue after meals, using a tongue scraper, drinking lots of water, and using an oral rinse are all great ways to keep your mouth clean and fresh during intermittent fasting.

Does Listerine Break a Fast?

While it is true that Listerine has a high alcohol content, it would take a lot of Listerine to break a fast.

A person would likely have to drink more than half a bottle for it to have any impact on their fasting state.

Drinking that much Listerine, especially on an empty stomach, could definitely lead to some stomach upset.

Will Listerine Strips Break a Fast?

Listerine strips could break a fast.

Listerine strips work by coating the teeth with a thin film of the product, and the ingredients in Listerine (including alcohol) could potentially disrupt ketosis or fasting.

If you are using Listerine strips as part of a fasting protocol, it is best to speak with a medical professional to verify if they are safe for you to use.


Can I Use Mouthwash During Ramadan?

Yes. Muslims are allowed to use mouthwash during Ramadan.

Mouthwash is considered a purifying agent, and it’s permissible to use it during fasting as long as it doesn’t contain any ingredient that would invalidate the fast, like alcohol.

In fact, many Muslims use mouthwash specifically for oral hygiene during Ramadan because of the increased risk of food particles becoming trapped between teeth and gums when fasting.

Does Flossing Break Your Fast?

It depends on what you mean by “flossing.” If you’re talking about using dental floss to clean between your teeth, then the answer is no, it doesn’t break your fast.

However, if you’re using water flossers or other devices that involve water being shot into your mouth, then the answer is yes, it does break your fast.

Does listerine strips break intermittent fasting?

Water flossers and other such devices work by shooting a stream of water into your mouth and around your teeth.

This stream of water dislodges food particles and bacteria from between your teeth and gums, and it also washes away any saliva or mucus that might be coating them.

Since this stream of water comes into contact with both your teeth and your mucus membranes, it could potentially break your fast. It’s best to avoid water flossers or other such devices during fasting.

Bottom Line

When it comes to fasting, mouthwash is generally considered safe as long as it doesn’t contain any ingredients that could potentially break the fast.

Flossing with traditional dental floss does not break your fast, but water flossers and other such devices should be avoided.

Be sure to consult your doctor or religious leader if you have any questions about what is and isn’t safe to use during fasting.

Rich Ross

Rich is a divorced father of two. He holds a Master of Public Health degree in Nutrition from the University of North Carolina’s Gillings School of Global Public Health. A former chemist, Richard has been offering private coaching sessions for more than 7 years. His mission is to help people live happier, healthier lives by showing them that they have power to choose what they eat and how they feel about themselves.