Opinion Review
Copyright ©The Author(s) 2020. Published by Baishideng Publishing Group Inc. All rights reserved.
World J Gastroenterol. Nov 21, 2020; 26(43): 6706-6709
Published online Nov 21, 2020. doi: 10.3748/wjg.v26.i43.6706
Gastric acid level of humans must decrease in the future
Shunji Fujimori
Shunji Fujimori, Department of Gastroenterology, Chiba Hokusoh Hospital, Nippon Medical School, Inzai 270-1694, Chiba, Japan
Author contributions: Fujimori S contributed to the writing this paper.
Conflict-of-interest statement: The author declares no conflict of interest.
Open-Access: This article is an open-access article that was selected by an in-house editor and fully peer-reviewed by external reviewers. It is distributed in accordance with the Creative Commons Attribution NonCommercial (CC BY-NC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited and the use is non-commercial. See: http://creativecommons.org/Licenses/by-nc/4.0/
Corresponding author: Shunji Fujimori, MD, PhD, AGAF. Director, Department of Gastroenterology, Chiba Hokusoh Hospital, Nippon Medical School, 1715 Kamagari, Inzai 270-1694, Chiba, Japan. s-fujimori@nms.ac.jp
Received: August 2, 2020
Peer-review started: August 2, 2020
First decision: October 18, 2020
Revised: October 24, 2020
Accepted: November 2, 2020
Article in press: November 2, 2020
Published online: November 21, 2020
Core Tip

Core Tip: We can intake almost ordinary food even after total gastrectomy. Small intestine itself can digest and absorb food without digestion in the stomach. The pH level of gastric acid in humans is much lower than that of most animals, and very close to that of carrion-eating animals. The benefit to produce a volume of gastric acid for humans is carrion eating, in which disinfection by gastric acid is important. Now, we have decreased risk of food poisoning because of clean environment. If this hygienic environment is maintained for a long time, our gastric acid level must be decreased gradually.