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What was the traditional belief about the cause of ulcers?

Stress
Viruses
Genetics
Diet

Answer

Stress was once believed to be the primary cause of ulcers. However, research has since revealed that the bacterium Helicobacter pylori is the main culprit. This bacterium damages the stomach lining, making it more susceptible to acid and pepsin, which can lead to ulcer formation. Stress can still contribute to ulcers by increasing stomach acid production, but it is not the primary cause.