Kissing Sores – Mouth Ulcers after Brushing Teeth – Mum Stops Using Colgate – Blisters Disappear

Kissing Sores – Mouth Ulcers after Brushing Teeth – Mum Stops Using Colgate – Blisters Disappear. If you suffer from recurrent mouth ulcers (canker sores) you may need to look more closely at the ingredients in your toothpaste – specifically Sodium Lauryl Sulphate is a cheap detergent many manufacturers add to make their toothpaste ‘froth’ in your mouth. More details below…. 

While you read why not listen to my album ‘Electro Baroque‘ (all tracks are also available on iTunes using the link here)? Classical music using modern instruments:

or if you prefer to listen to my electronic music album ‘Studio Valiumm‘ here are the videos (also on iTunes using the link here):

More info about my music is at the dedicated website

As a child one of my best ‘close to hand’ sources of medical advice was Mum. I recently popped up to the North of England to celebrate my Mother’s birthday and over cake we got on to talking about health issues. She told me that she had recently stopped using her favourite toothpaste (Colgate) because she had read that it can cause mouth sores.

She had suffered from recurring mouth ulcers for many years and had never thought it might be related to the toothpaste she had used all her life. Then she discovered that an ingredient in Colgate toothpaste called Sodium Lauryl Sulphate (SLS) can lead to something called Recurrent Aphthous Ulcers also known as Canker Sores or Mouth Ulcers.

Mum – Happy now the ulcers have gone

My mother changed her toothpaste to one that was sodium lauryl sulphate free and she no longer suffers from recurring mouth ulcers.

As I have also been a life-long user of Colgate (recommended by Mum!) I decided to do some research and check out why manufacturers use sodium lauryl sulphate. I was rather disappointed to discover that this ingredient does not really contribute to the hygiene of my mouth – it is added as a kind of marketing gimmick. It actually causes the toothpaste to froth up in your mouth so you think it is helping to clean up the ‘nasties’. It is this ability to cause a froth which also makes it a popular ingredient in shampoos.

Where to find the ingredients…

So what is Sodium lauryl sulphate or SLS? It is a cheap anionic surfactant – which means it can help oily things to mix with water. In other words it is a detergent and a popular cheap ingredient in cosmetics (helps remove oil from your skin) and as a household cleansing agent (for greasy kitchen floors). This is the stuff that Colgate-Palmolive (and other makers of SLS containing toothpaste) recommend you put into your mouth at least twice a day.

As well as creating the frothy feel when you clean your teeth SLS can also strip away the natural protective lining of your mouth. Your body’s surface cells secrete oily substances to protect the mouth and other surfaces from bacteria – these oily secretions contain natural chemicals which can attack harmful microbes. These protective substances are washed away by the detergent action of SLS (in the froth) – it also attacks the protective cells lining the surface of the mouth. This opens the door to bugs and ulcers.

Sodium lauryl sulphate (Sodium lauryl sulfate)

Like my mother I will now be looking to replace Colgate as my preferred toothpaste with an SLS-free alternative. Manufacturers have a number of tricks to hide unwanted chemicals when listing ingredients on their packaging. For example sodium lauryl sulphate (SLS) can also be described using a number of other names like those below:

  • A13-00356
  • Akyposal SDS
  • Aquarex Methyl
  • Dodecyl sodium sulphate
  • Lauryl sodium sulphate
  • Monododecyl ester
  • Monododecyl ester sodium salt sulphuric acid
  • Sodium dodecyl sulphate
  • Sodium laurylsulphate
  • Sulphuric acid monododecyl ester sodium salt

(note: in the US the ‘ph’ in sulpher/sulphate/sulphuric is replaced with an ‘f’)

As a postscript I should also mention that there are other causes of sores in a person’s mouth. For example, it is possible to contract Herpes virus sores by oral sex (and other close contact with a carrier’s bodily fluids). However it is quite possible that brushing with an SLS containing toothpaste may reduce you mouth’s natural protective barriers to such infectious agents. Therefore I recommend you check with your medical adviser whether it is appropriate to use an SLS containing toothpaste prior to oral sex.

The detergent SLS in toothpaste can increase susceptibility to infection by oral pathogens

Health tip of the week: The froth in your mouth is not necessarily good for oral hygiene.

Safe brushing!

Chris Duggleby 

The Author is not professionally qualified to give medical advice – if you have any concerns about sores, toothpaste or oral sex please consult your dentist or doctor.

Author – on the way to the supermarket to find a SLS free toothpaste

You can read more about SLS and mouth ulcers from the US National Library of Medicine/National Institutes of Health using the articles here and here.

For any readers contemplating exchanging bodily fluids with an astronaut here is a public health video you should watch first…

If you found this article interesting please consider taking a look at some of my other recent reports on similar subjects.

Just click on the titles below:

…starting with some fun related articles:

8th Mar 2017: Nano Chip Cock Ring Detects STIs – Size, Thrust, and Speed – From Penis via Smartphone to Facebook

28th Feb 2017: Vaccinations Cause Children to Masturbate – Public Frustration At Austrian Article:

16th Oct 2016: How to Prevent Smelly Trumps – Scientific Breakthrough in Australia – Good Carbs Mean Good Farts 

9th March 2016: Penis Ring Emergency – German Fire Fighters Rescue Man From Painful 13 Cock Ring Torture: Vorsprung durch Technik and erectile dysfunction

21st June 2015: Bio-undies: Guilt free Passion with ‘Easy Emma’ and ‘Loose Harry’and Getting Rid of Garden Snails with Rent-a-Duck

4th March 2015: Hamburg Reeperbahn (St. Pauli): Germans install walls that urinate on passers-by

17th April 2014: Niche On-line Dating Services (Specialities: Herpes, Thrush and Genital Warts)

18th August 2012: How Bavarians and Austrians use their middle finger – Fingerhakeln: a men-only sport (did Arnold Schwarzenegger start training this way?).

You can also find some of my more humorous reports in the Alpine Press section of this site using the link here.

some here is some more serious stuff:

12th June 2016 Hospital Serial Killer – Super Bugs Created With Jumping Genes During Bacterial Sex

21st May 2016 Skin Cancer and Cataracts From Your Car – Poor UV Side Protection – Windows Tested From 15 Vehicle Makers

19th April 2016 Torture In The Shower – Face and Body Soap Allergies – Main Suspect: Pears Transparent Soap

3rd March 2016 Using Gene Drives To Change Mosquito Sex In Fight Against Zika, Dengue and Malaria

3rd Feb 2016 Zika Infection Spread By Sex In Dallas – Earlier Sexual Transmission In Colorado – Detailed Symptoms 

31st Jan 2016  Bed Bugs – Insecticide Resistance – Arbovirus Transmission – Zika and Microcephy

13th Jan 2016 Kill Head Lice In A Day With The Newly Developed Plasma Nitcomb From The German Fraunhofer Institute

26th July 2015 Poison in your Washing Machine: Allergic Contact Dermatitis from Laundry Detergents, Softeners, Conditioners and Whiteners

29th December 2012: Spreading diarrhea and vomit through the washing machine– The Norovirus propagator in our kitchen

…please visit again.


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