List two common acids that are not harmful to the body when ingested and a product in which each is used.

Not all acids are harmful to the body. Some acids are called dietary acids, that is, we take then in our diets. Examples of this is citric acid and lactic acid. Citric acid is found in oranges, limes, lemons, etc. Lactic acid is found in milk. Lactic acid is used in the industrial production of milk while citric acid is used in the industrial production of fruit drinks such as Ribena drink.