1. Coffee and caffeine consumption reduce the risk of elevated serum alanine aminotransferase activity in the United States 
Constance E. Ruhl, James E. Everhart 
Gastroenterology 
Volume 128, Issue 1, Pages (January 2005)
DOI: /j.gastro
Copyright © 2005 American Gastroenterological Association Terms and Conditions

2. Figure 1
Prevalence of elevated ALT activity by caffeine intake quintiles and coffee consumption categories (n = 5944). Error bars represent standard errors of percentages. *P < .05 compared with lowest quintile for caffeine or 0 cups/day for coffee.
Gastroenterology  , 24-32DOI: ( /j.gastro )
Copyright © 2005 American Gastroenterological Association Terms and Conditions