Disorders of the small intestine

Duodenal ulcers

• A large 1997 prospective cohort study of 47,806 American men assessed the relationship between caffeine, alcohol and smoking on the risk of developing duodenal ulcers¹⁸. None of these factors were found to be associated with a substantial increase in risk

• A further 2013 cross-sectional study of 8,013 healthy subjects in Japan also showed no association between coffee intake and duodenal ulcers¹⁷

• A 1990 study shows no difference in the daily pattern of coffee intake, or the pattern of complaints after drinking coffee between those with duodenal ulcers and controls¹⁹