Question

How are acids helpful in maintaining good health?

Answer 1

Acids in the body can be found either in the in the alimentary canal (especially in the stomach as HCl) or as in the blood stream. 

Acidic compounds serve two important roles in the body of living organisms. This can be summarized as follows: 

1) Importance of Acid in the Stomach:
  
  i) Prevent infection - the acid in the stomach kills the bacteria you ingest with food.
  ii)Proteolytic action- the acid in the stomach helps breakdown proteins                            (proteolytic) for ease of digestion
  iii) The HCl in the stomach acts as a chemical signal, allowing food to pass down               from the stomach into the duodenum as well as signalling the pancreas to                  secrete its digestive enzymes.
   iv) The presence of HCl in the stomach also activates the digestive enzyme pepsin
      - which is useful in the digestion of protein.

2) Acid in the blood stream has the following role: 

Acidic compounds in the blood help to maintain the body's acid-base balance. This is the range of blood pH. It is quite specific and even tiny deviations from the normal, can lead to serious health problems such as inflammation which may affect all body organs. 
The blood pH is slightly acidic, and the presence of acidic compounds ensures that this range is maintained and does not get to extreme alkalinity.

Answer 2

Answer:

SOME ACIDS ARE VERY HELPFUL TO MAINTAIN OUR GOOD HEALTH BY MAKING OUR IMMUNE SYSTEM STRONG AND HEALTHY.

EXAMPLE-

LACTO ACID WHICH IS PRESENT IN CURD . THAT ACID HELPS US IN DIGESTION.

AMINO ACID HELPS IN OUR IMMUNE SYSTEM BY GIVING PROTEIN