The esophageal pH test is an outpatient procedure performed to measure the pH or amount of acid that flows into the esophagus from the stomach during a 24-hour period. The procedure is commonly used ...

Deficiencies can occur when you don’t get enough B-12 from your diet or when your body can’t use it properly. Typically, vitamin B-12 deficiencies can be detected through the vitamin B-12 test.

The pH of blood refers to how acidic it is. Changes to blood pH can signal underlying medical issues, including metabolic acidosis, respiratory acidosis, metabolic alkalosis, and respiratory alkalosis ...

The pH scale is used to measure the acidity of a fluid. The pH scale ranges from 0 to 14. A pH of 7 is neutral, whereas a pH result below 7 is acidic and above 7 is alkaline. Urine has the widest ...