Nutrition and bad breath

If you have bad breath after eating, this could be the result of the pre-digestion of protein-containing food (milk, cheese, raw meat) by so-called anaerobic bacteria.

However, if the problem persists for a long time after a meal (e. g. on a diet, regular training), this can be the result of a lack of fluid in the body, or because the body wants to convert the fat reserves into energy.

This is called ketosis; it also produces a kind of chemically bad breath.

If the bad breath problem occurs mainly in the evening, it is probably due to an increasing lack of oxygen in the saliva. This probably comes from the many speeches during the day - and almost everyone is doing so.


Dairy products affect the breath unpleasantly. In this case, the protein content, not the fat content, plays a role. Semi-skimmed milk is just as bad as whole milk. The problem arises because certain bacteria in the mouth break down milk proteins (sulphur-containing) resulting in bad smell and taste.

Onions and garlic immediately cause bad breath. The reason for this is due to the intensive odour of sulphur compounds, which are inherently present.

Sugar is a problem because all bacteria multiply well in a sugar-rich environment. So if you eat peppermint or sweets, make sure they are sugar-free. Some peppermint products simply claim to have a breath refreshing effect despite their sugar content. Of course, you do exactly the opposite! Don't be fooled, because although you may have a "good taste" in your mouth, the breath can smell bad for others.

Coffee (also decaffeinated) is a problem because coffee contains acids. As a result, the bacteria proliferate very quickly and immediately produce the "coffee breath".


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Alcohol can make an occasionally bad breath into a very bad breath or taste. There is no difference whether it is alcohol in beer, wine, high-proof beverages or even in cosmetic mouthwashes. Alcohol makes the mouth dry very quickly, which can lead to bad breath. Some mouthwashes even contain more alcohol than wine (which on average contains 11 - 13%). In addition, some studies have shown that too much alcohol damages gums and oral mucous membranes over a longer period of time.


medicines and bad breath

Certain medications can exacerbate a bad breath problem as a side effect.

Typical examples of this are:

  • medicines for depression,

  • medicines for high blood pressure,

  • Remedy for allergies or to reduce swelling,

  • Medications containing female hormones (including birth control pills).

  • As a side effect, they all lead to a dry mouth.

Some medicines for treating digestive problems claim to cure bad breath. Trying to do this is usually a waste of time, because bad breath comes from the stomach in very few cases.

For example, the correlation between long-term use of antibiotics and the development of bad breath was observed. The first group of patients who reported this to us took an antibiotic for acne treatment. This group took this antibiotic for months and found that both breath and taste had changed very unpleasantly. This is due to the fact that an antibiotic kills bacteria, including those that are necessary for humans. Unfortunately, the undesirable bacteria return as resistant strains, which increases the problem even further. The use of an antibiotic to treat bad breath will therefore not help. On the one hand, the bacteria concerned are desired and necessary; on the other hand, they return - even if the symptoms disappear for some time - after a while.

Sulfonamides or drugs for allergy can also cause bad breath, because malodorous sulphides can develop when they are broken down.


Toothpaste and bad breath


Most commercial toothpastes contain an aggressive substance, known as sodium lauryl sulphate (as a so-called detergent). This substance is mainly added to make the toothpaste foam. However, the foam does not have a cleansing effect, but should rather convey the feeling for it.

However, these toothpastes have a drying effect and thus increase the risk of bad breath. Incidentally, these foamers eliminate the effects of Atemfrisch®. Please make sure not to use toothpastes with foaming agents.

Atemfrisch® mouthwash is produced in Germany. Furthermore, it does not contain any artificial colours, saccharin or aggressive cleaning agents. And no alcohol, of course!

And you already know this: permanent rinsing, cleaning, the use of dental floss and tongue scraping will not release you from bad breath. The reason: the current range of standard toothpastes, mouthwashes, chewing gum, etc. has never been developed to combat bacteria that cause bad breath.

Atemfrisch® mouthwash has been specially designed by Tetrobeath GmbH for this purpose.


Dry mouth and dry tongue

A dry mouth (usually rare) is a typical indication of bad breath and acidic/bitter/metallic taste. The drier your mouth, the more likely you are to have bad breath.

This is related to the amount of oxygen in the saliva. The bacteria that cause bad breath need an anaerobic (oxygen-free) environment. If the mouth becomes drier, the saliva disappears or it becomes thicker. This also means a reduction of oxygen. The bacteria start to produce sulphur compounds, e. g. hydrogen sulphide (odour of rotten eggs).

Incidentally, we all start producing less saliva at 25 years of age, which increases the risk of bad breath.

As allergies cause an increased production of mucus, they also increase the problem.

For example, the more you talk during the day, the thicker your saliva becomes. This may cause bad breath. This depends on how the group of bacteria (which lives in the back part of the tongue and throat) reacts to changes in the environment. Normal saliva contains quite a lot of oxygen. The less oxygen there is, however, the more an anaerobic environment is created - the ideal conditions for the bacteria to produce sulphur.

They clean the tongue when mucus has accumulated in the throat. This mucus is a breeding ground for the sulfur-producing bacteria. The reason for this is that it contains the amino acids cysteine and methionine. These can be easily metabolized into unpleasant smelling sulphur compounds.

Very often a white layer of coating is visible on the back of the tongue. And these are precisely those large quantities of sulphur sulphide and other bad smelling and bad tasting compounds. If this layer gets a yellowish glow, it is a sign that your problem is chronic (sulphur has a yellow colour).

It is also important to mention that everyone has a morning breath. During sleep, the salivary glands do not produce saliva and the mouth becomes drier. This in turn can lead to the production of sulphur compounds. When you wake up in the morning, you will first notice the bad taste in your mouth. You can avoid this by using Breath fresh breath before going to bed.


Diabetics and Atemfrisch®

Atemfrisch® products are ideal for diabetics and can be recommended!

Diabetics have special mouth problems:

  • a very sensitive oral mucosa
  • the oral mucous membrane heals very badly
  • you always have a dry mouth

Since their sensitive oral mucous membranes are often prone to inflammatory changes, diabetics should never use alcohol-containing mouthwash. Alcohol has a very negative effect on the mucous membrane of the mouth: It can be the cause that entire layers of mucous membranes become detached and inflammatory changes (eye) and other injuries in the mouth can occur. Almost all commercially available mouthwashes contain alcohol, therefore the alcohol-free breath freshener® mouthwash is an excellent alternative!

Diabetics always have a dry mouth and therefore tend to have bad breath. Healthy saliva has a high oxygen content. The bacteria that cause the smell of sulfur that you smell as bad breath are anaerobic bacteria that don't like oxygen. They therefore prefer to stay in the mouth where there is little or no oxygen (in the tongue papillae and in the throat). But a dry mouth means that there is little saliva (and where there is little saliva, there is little oxygen). Consequently, anaerobic bacteria form more volatile sulfur compounds (such as hydrogen sulfide) in a dry mouth.

Atemfrisch® products use hdO2, high-dose oxygen to combat bad breath. It is based on the simple principle that by adding more oxygen to the oral cavity, bacteria are prevented from producing sulfur-containing substances. hdO2 absorbs all available sulfur molecules, including those in foods such as mercaptans, which are found in onions and garlic, for example.

And that's excellent news for diabetics:
According to the latest studies, the bacteria that cause gingivitis are related to the anaerobic, sulfur-producing bacteria. Oxygen-containing compounds such as hdO2 are able to prevent gum disease from developing!


Atemfrisch® Mouth rinse has also been specifically designed to prevent bad breath with regard to the entire composition.

Read more:

Treatment of bad breath