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Bad breath during intermittent fasting: what causes it?

Jul 25, 2026Elixio

During fasting, people may drink less water, chew less and produce less saliva. With longer carbohydrate restriction, ketone compounds with a characteristic smell may also appear.

What can help?

  • drink water regularly if fasting rules and health allow,
  • clean the tongue thoroughly,
  • brush and clean between the teeth,
  • limit smoking and excess coffee,
  • treat gum disease.

Oil pulling may provide a clean feeling, but it does not replace hygiene or address a metabolic cause of odour.

Read about oil pulling and breath and the Elixio oil ritual.

FAQ

Does the smell mean illness?

Not always, but a sudden, strong or unusual odour with general symptoms requires consultation.

Is mint toothpaste enough?

It may mask the smell, but the cause still needs to be addressed.



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