Normal pH levels for the human stomach range between 1 and 5, according to These numbers indicate high acidity, which is because the stomach produces hydrochloric acid to help it digest food. The acid is neede... More »

The normal blood pH balance in the human body is between 7.35 and 7.45, says MedicineNet. Blood pH represents the concentration of hydrogen ions in the blood, and pH stands for power of hydrogen. More » Science Human Anatomy

The normal range for a carbon dioxide blood test is 23 to 29 milliequivalent units per liter, explains Healthline. Normally, doctors order a blood pH level test along with a CO2 blood test. A pH test measures alkalinity ... More » Health Medical Ranges & Levels

The pH of the stomach ranges between 1 and 5, according to About. The exact pH of the stomach varies according to the types and quantities of food that have been eaten recently. More »

The optimum pH levels of the human body vary depending on the specific body part, states the Journal of Environmental and Public Health. For example, the stomach has a very acidic pH range of 1.35 to 3.5, while the bile ... More » Health Medical Ranges & Levels

A normal liver has a neutral pH of 7, which is the same pH as pure water, according to Scientific American. In a pH-neutral solution, there is an equal number of hydrogen and hydroxide ions. More »

The pH in the small intestine increases from pH 6 in the duodenum to pH 7.4 at the distal end of the small intestine in the terminal ileum. The pH decreases to pH 5.7 in the cecum but increases to pH 6.7 in the rectum. More »