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Low pH Diet and Oral Health

by Haddon Suttner

Excessive use of food with low pH value can cause dental and oral health issues. Low pH foods include, but not limited to, alcohol, cola and soft drinks, fruit juices, fresh fruit, tea, coffee, pickle and yogurt. One of the damages of such food is dental erosion. Dental erosion is the breakdown of tooth structure caused by the effect of acid on the teeth. Dental enamel is the thin, outer layer of hard tissue. This tissue helps in maintaining structure of tooth and shape. It also protects it from decay.

ph Food

pH is a measure of acidity.  Lower pH value indicates that the food is more acidic. Higher pH value means that food is more alkaline. pH value ranges from 1-14. 1 is the most acidic and 14 is the most alkaline, while 7 is neutral.

Sugar feeds the bacteria that produce acids, which in turn causes cavities. Prolonged acidic pH in mouth is responsible for facilitating cavity-causing bacteria. To avoid any dental or oral issue, you need to minimize lowering of the pH. This can be done either by avoiding acidic and sugary food/drink and/or by using alkaline and neutralizing dental products. If you can keep the pH of the mouth neutral between meals, you can maintain health.  If the caries infection is already there, you can use alkaline pH products to promote the re-growth of healthy bacteria.


What to do?

  • Decrease or avoid sugar/carbohydrate containing food in your diet. Also reduce or avoid non-sugar containing acidic beverages (diet soda, coffee, tea, alcohol).  These foods can cause long-lasting acidic pH in the mouth, so healthy bacteria are killed and cavity-causing bacteria flourish.
  • Check the acidity (pH) of the dental products you are using.  Do they neutralize your mouth?
  • Consult your dentist for further guidance.


You may call Dr. Haddon Suttner for any type of dental problem on 02 9365 6197  or visit our the website Dentist Bondi.

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