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present in food if any. This hydrochloric acid also helps in the digestion of food
we eat.

Digestion takes place in our stomach in acidic medium.
The pH value of our stomach is near 1.2.
But in the case of overeating the receptors of walls of stomach get wrong message
and start producing more acid.
This decreases the pH value of our stomach, resulting in the condition of
hyperacidity.
This creates problems and we feel burning sensation and uneasiness, and
sometimes vomiting tendency also.

• To neutralize excess acid produced by stomach, an antacid (a medicine)is
taken orally.
This neutralizes the extra acid produced by our stomach and we feel
comfortable. Milk of magnesia is taken as medicine which is a mild base.

4- pH changes as the cause of tooth decay.

• The normal pH range for saliva is 6.2 to 7.6.

• Food and drinkreduce the pH level of saliva.
For example, bacteria in your mouth breaks down the carbohydrates you consume,
releasingvarious acids.

• Tooth’s enamel is made up of calcium phosphate.
This is insoluble in water and is the hardest substance found in human body. But
it starts corroding because of acid (pH of mouth goes below 5.5).

Sometimes food particles get trapped between teeth gap.
After some time bacteria present in mouth starts acting upon sugar, present
in food items and produces acid.

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