Dr. Barry J. Marshall proved to the medical community that ulcers weren’t caused by stomach acid by drinking Helicobacter pylori bacterium. He developed stomach ulcers within days, treated them with antibiotics, and went on to win a Nobel Prize. – WTF Fun Facts
Source: https://www.npr.org/templates/story/story.php?storyId=4934498
stomach acid
Stomach acid is no joke
Parietal cells in your stomach produce hydrochloric acid which helps to break down food. This acid is so concentrated that one drop would eat straight through a piece of wood. – WTF Fun Facts
Source: https://www.sharecare.com/health/digestive-health/how-stomach-keep-digesting-itself