Gastric juice is produced in the stomach and has a pH ranging from 1.5 to 3.5. This highly acidic environment is essential for:

* Digesting food: The acidity helps break down proteins and kill bacteria.

* Activating enzymes: Pepsin, a key enzyme for protein digestion, is activated by the low pH of gastric juice.

While other bodily fluids like urine and sweat can be acidic, their pH is generally higher than that of gastric juice.