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A 44-year-old member asked:

the human stomach is an acidic environment. is the optimum ph of pepsin high or low?

1 doctor answer2 doctors weighed in
Dr. Andrew Seibert
Gastroenterology 35 years experience
Pepsin: Pepsin operates best in a very acid environment. It's optimal pH is 1.5, which is approximately the same pH as the stomach environment where the acid has been secreted. Hope that helps.

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Last updated Jun 8, 2017
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