Energy drinks can cause canker sores due to several factors:

High Acidity

Energy drinks often contain citric acid or other acidic compounds for flavoring. These acids can irritate the sensitive lining of the mouth, making it more susceptible to sores.

Caffeine and Dehydration

Energy drinks are high in caffeine, which can lead to dehydration. A dry mouth has less saliva to protect against irritation, increasing the risk of canker sores.

Artificial Sweeteners

Some energy drinks contain artificial sweeteners like aspartame, which may irritate the oral tissues in some individuals, potentially triggering sores.

High sugar content

Some individuals report an increase in outbreaks after consuming sugary foods or beverages.