Submit. Hydrochloric acid is one of the main components of the stomach's naturally produced gastric acid and is used in helping to break down consumed food by stimulating the release of digestive enzymes.elery. Celery is a low-calorie, healthy alternative to increase the amount of hydrochloric acid in the body, partly because of its ability to increase bile acid secretion (which can help to lower cholesterol). It is also a natural source of sodium, which is necessary for the body's production of hydrochloric acid.