Here's why:

* Gastric juice, produced by the stomach, has a pH ranging from 1.5 to 3.5. This highly acidic environment is crucial for:

* Digesting food: The acid breaks down proteins and activates digestive enzymes.

* Killing bacteria: The acidic environment helps kill harmful bacteria ingested with food.

While other organs like the small intestine and skin also have acidic environments, their pH levels are higher than the stomach's.