The best mouthwash for 2023

Mouthwash is a misunderstood tool for looking after your oral hygiene.

Not everyone needs it, so you may even be wasting money if you buy it unnecessarily. And some of the manufacturer claims are over-hyped.

But mouthwash does have its uses — it can manage bad breath, ease pain and inflammation in the mouth and protect against tooth decay.

If you do need a mouthwash, below are my recommendations based on my experience as a dentist and research into the various products available.

Our recommendations

Best all-round: Listerine Total Care 10 in 1 Milder Taste

Best budget: Dentyl Dual Action

Best unflavoured: Ultradex Daily Oral Rinse

Best for bad breath: The Breath Co

Best for dry mouth: Biotene Dry Mouth Relief

10 useful things to know when choosing a mouthwash

1. Mouthwash can be beneficial for those with specific dental issues, but it’s not essential for everyone.
2. Mouthwash is not a substitute for brushing and flossing. Physical cleaning is more important.
3. Use fluoride mouthwash in addition to fluoride toothpaste to reduce decay risk.
4. Alcohol-free mouthwashes are recommended over those containing alcohol.
5. Consult a dental professional if you have persistent bad breath.
6. Avoid using mouthwash immediately after brushing.
7. Always follow the usage instructions on the mouthwash label.
8. Children under six should not use mouthwash due to the risk of swallowing.
9. Mouthwash is normally considered safe for people who are pregnant, but this does depend on the ingredients list.
10. Consider eco-friendly mouthwash options to minimize environmental impact.

Best all-round mouthwash

Listerine Total Care 10 in 1 Milder Taste

Approx. £4 per bottle — Amazon, Boots.

Listerine is one of the most widely known mouth care brands, and can be found around the world.  It is widely available in stores and online, with a range of flavours and bottle sizes.

Best budget mouthwash

Dentyl Dual Action

Approx. £3 per bottle — Boots, Amazon.

More often than not, Dentyl it is the cheapest on the shelf, whilst still meeting the criteria of containing fluoride and being alcohol free.

Best unflavoured mouthwash

Ultradex Daily Oral Rinse

Approx. £6 per bottle — Boots, Amazon.

Ultradex comes as an unflavoured mouthwash, but with a sachet available to add flavouring if you want it. As well as having no taste, there is no burning sensation as it is alcohol free.

Best for bad breath

The Breath Co Alcohol Free Fresh Breath Oral Rinse

Approx. £7 per bottle — Boots, Amazon.

I recommend this mouthwash as it has such positive feedback from thousands of customers. Whilst it isn’t a cheap, it’s worth a go as it comes with a money back guarantee.

Best for dry mouth

Biotene Dry Mouth Relief

Approx. £8 per bottle — Boots, Amazon.

I highly recommend Biotene Mouthwash for people who experience dry mouth symptoms.

Buyer’s guide: most people don’t need a mouthwash

Mouthwash is not necessary for most people.

Physical cleaning is most important. Brushing twice a day for two minutes with a fluoride toothpaste and cleaning in between your teeth is enough to achieve good oral health.

However, mouthwashes can be beneficial in addition to this if there are reasons why physical cleaning is not good enough, or if additional doses of certain ingredients are needed. 

The advice of professional organisations around the world varies.

The National Health Service advises: “Using a mouthwash that contains fluoride can help prevent tooth decay, but don’t use mouthwash (even a fluoride one) straight after brushing your teeth or it’ll wash away the concentrated fluoride in the toothpaste left on your teeth.”

The American Dental Association says: “While not a replacement for daily brushing and flossing, use of mouthrinse (also called mouthwash) may be a helpful addition to the daily oral hygiene routine for some people.”

The Canadian Dental Association advises: “As part of your morning oral health routine, swish with an oral rinse (also known as mouthwash or a mouth rinse) once a day. This will help keep odour-causing bacteria at bay.”

These people do benefit from mouthwash:

• Adults at high risk of tooth decay – to get an additional dose of fluoride
• Children over the age of six at high risk of tooth decay  – to get an additional dose of fluoride
• People with sore mouths due to infection, ulcers or surgery should use mouthwash – specific ingredients can help prevent infection of open wounds and ulcers, reduce inflammation, and help manage soreness in the mouth. 
• People who struggle using a toothbrush should use a mouthwash – for example people who struggle to physically clean their teeth with brushing due to disabilities. The fluoride can protect against tooth decay whilst anti-plaque ingredients can help manage the inevitable build up which can’t be removed by brushing.
• People with gum disease should use a mouthwash to help manage plaque levels.
• People with sensitive teeth – by using mouthwashes containing desensitising ingredients to help manage sensitivity.
• People with bad breath – to help mask the smell and to help manage the causes.

Choose a mouthwash with fluoride and without alcohol

Alcohol is added to mouthwash as a preservative. It has little effect on most people, other than a mild burning sensation.

But some people find the alcohol content can actually dry the mouth out and make bad breath worse. There is some conflicting evidence about whether or not alcohol in mouthwash can increase cancer risk.

Overall, there is nothing to suggest that alcohol containing mouthwashes are more effective than alcohol-free mouthwashes, so it’s best to avoid it if you can.

We do recommend opting for a mouthwash with fluoride, unless you are using it for another specific purpose such as pain relief. The additional fluoride can help to prevent tooth decay.

Don’t use it more than twice a day unless told to by your dentist

Most mouthwashes will give you the most benefit if they are used twice a day. You are unlikely to get any extra benefits from using it more often.

If you are using mouthwash for a specific condition, or after oral surgery, your dentist might recommend it differently – such as three or four times per day. This is for a short amount of time – normally a week or two. Follow the advice given by your dental care professional.

Here’s why you should use mouthwash at a separate time to brushing

The basic message is don’t use mouthwash straight after brushing. Rinsing after brushing removes the toothpaste you have just used.

Using mouthwash at a different time to brushing leaves the toothpaste contacting the teeth to allow the fluoride to have maximum benefit.

Using mouthwash before brushing has few benefits

Using mouthwash directly before brushing has very few benefits – it is, essentially, a waste of money. This is because the act of brushing the teeth will remove any ingredients left by the mouthwash.

Using mouthwash after brushing creates a fluoride wash-out

Research has shown that using a non fluoride or low fluoride mouthwash after brushing reduces the anticaries benefit of toothpaste. This is a wash-out effect.

To prevent this wash out, wait at least half an hour after brushing before using mouthwash.

However, there are a limited number of studies showing that mouthwash with a high enough fluoride content might not have a negative effect if used straight after brushing. A mouthwash containing a minimum of 100ppm fluoride “should not interfere with the toothpaste’s anticaries protection”.

Ingredients in mouthwash and toothpaste can react with each other

The other reason to leave it at least 30 minutes after brushing to use a mouthwash is because some ingredients in mouthwash can interact with some toothpastes. This makes the mouthwash less effective. 

Some toothpaste ingredients (like calcium hydroxide or aluminium hydroxide) can form a complex with fluoride ions, which will reduce the effectiveness of a mouth rinse. 

Two studies looked at two specific ingredients: Chlorhexidine and CPC. Both remove less plaque if used in a mouthwash directly after using a toothpaste containing SLS, as a result of ionic interactions.

Even though some higher fluoride mouthwashes will not have a wash out effect if used straight after brushing, if these mouthwashes also contain chlorhexidine or CPC then they will not be as effective due to chemical reactions.

This is why it is best to use mouthwash at a different time of day.

Don’t rinse with water after brushing either

Rinsing your mouth with water after brushing your teeth rinses off the toothpaste you have used.

Before modern toothpaste was invented, gritty pastes made from ingredients such as eggshells and urine were used to cleanse the teeth. This is why it was common to rinse after brushing.

However modern toothpaste doesn’t contain these harmful or unhygienic ingredients. It is totally safe to leave on your teeth. In fact, it has many beneficial ingredients. Avoid rinsing to avoid washing these off before they can have maximum benefit.

People who rinse with water after brushing have more tooth decay than people who don’t.

5 interesting things about mouthwash from scientific studies

Clinical trials have extensively tested various products and ingredients under different scenarios. Here’s what the research says: