If you constantly stink from the mouth, go to the dentist for a sanitary cleaning - the remnants of rotting food stink between the teeth. Later, use the interdental brushes, help. If temporarily, then advice has already been given
To the above I will add a sprig of wormwood, as a teenager it helped me from the smell of cigarettes, to chew a little and rub in my hands. I don't know how harmful it is, but nothing happened to me.
If from the more restrained and aesthetic ways that you can practice at the table, then these are coffee, milk and dark chocolate.
In general, check your stomach and brush your teeth;)
You need to thoroughly brush your teeth and not only your teeth, but also your entire mouth. A lot of bullshit accumulates on the language (I don't even know its name), which stinks and is also full of germs. I just bought a nail file (all these floats on the back of toothbrushes are bullshit) and use a file to remove all this stuff from my tongue. In addition, you need to cough up well, there can also be any rubbish in the throat. Then there will be no stench from the mouth. In addition, you can suck up some lollipops (the same hols or cool sage lollipops are sold in pharmacies, although they are expensive), they will even smell pleasant for a while, which interrupts even the cigarette stench.
If there is still a stench from the mouth, consult a doctor, perhaps there are health problems.
The smell from the mouth is the smell of microbes (to understand that there is a smell from the mouth - you can lick the inside of your hand and smell it after 5-10 seconds), the natural way of getting rid of is garlic, I completely agree here, but in this case there is no less nasty smell to others. I have always heard the advice that you need to dip a slice of lemon in ground coffee with sugar - then the smell of garlic will be interrupted. This is such a simple scheme.
A hard apple or carrot will clean your teeth very well from previous meals and freshen your breath. The teeth after them are clean, and breathing improves, in addition, they remove the unpleasant aftertaste of coffee, for example. In general, breathing problems can be the result of stomach problems.
you take the garlic and haveesh it, the smell from the mouth is finally cannibalized !!! Only the only minus is the smell of the garlic itself: DDD but this is already not the same
Garlic, nutmeg, cinnamon, cloves, mint, here is a small list that can be continued for a very long time. Especially it is worth paying attention to nutmeg - it itself almost does not smell, but removes others at once.
I remember in one of the series "Survive at any cost" Bear Grylls advised to eat a sprig of parsley in such a situation. Unfortunately, I couldn't find the series itself.
Will it interrupt or neutralize?
If the former, then I highly recommend garlic. One clove in a salad or sauce - you will feel it all day long. Also in this matter coffee will help well.
And tea neutralizes odors. There is one most amusing practice - rinsing your mouth with tea after eating, so that the food does not smell. And it works! But, of course, at the table for such things you will be incinerated with hating eyes. Practice it in the bathroom, good health! Also, one of the life hacks for getting rid of unpleasant odors is tea bags in shoes.