Is pepsin a secreted protein?

Pepsin belongs to the secretory proteins, pepsin is a digestive enzyme secreted by the master cells in the mucosa of the stomach wall.
Pepsin are transformed from pepsinogen, pepsin has a digestive effect and can digest proteins; pepsin is secreted through the master cell and then activated by hydrochloric acid in the gastric juice in the stomach to play a digestive role, clinically, pepsin can be extracted from pigs, goats and other animals for the treatment of dyspepsia.
Proteins in the human body are divided into secretory proteins and non-secretory proteins; secretory proteins refer to substances such as white matter or enzymes that are secreted out of the cell in the organism through endocrine pathways, autocrine secretion, paracrine secretion, etc., such as pepsin, salivary enzymes, trypsin, etc.
Non-secretory proteins refer to proteins synthesized by the body to play its role in the cell, not secreted to the outside of the cell, such as hemoglobin, respiratory enzymes and other common.
If there are symptoms of physical discomfort, you should go to the hospital and consult a physician for guidance.