The Human Digestive Tract pH Range Diagram

The pH is a way of measuring how acidic or alkaline the body is. The pH in the human digestive tract varies greatly (see Human Digestive Tract pH Range Chart on the left side). The pH of saliva is usually between 6.5 - 7.5. After we chew and swallow food it then enters the fundic or upper portion of the stomach which has a pH between 4.0 - 6.5. This is where "predigestion" occurs while the lower portion of the stomach is secreting hydrochloric acid (HCI) and pepsin until it reaches a pH between 1.5 - 4.0. After the food mixes with these juices it then enters the duodenum (small intestine) where the pH changes to 7.0 - 8.5. This is where 90% of the absorption of nutrients is taken in by the body while the waste products are passed out through the colon (pH 4.0 - 7.0).


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Information on this website is provided for informational purposes and is not meant to substitute for the advice provided by your own physician or other medical professional. You should not use the information contained herein for diagnosing or treating a health problem or disease, or prescribing any medication. You should read all product packaging carefully. If you have or suspect that you have a medical problem, promptly contact your health care provider. The statements on this website have not been evaluated by the Food & Drug Administration. The statements on this website are not intended to diagnose, treat, cure or prevent any disease. Pregnant and lactating women should always consult their health care professional before using any dietary supplement. The information contained on this website was derived from medical, nutritional, and media publication.

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