The behaviour of gamma-GT, an enzyme whose activity is related with alcohol intake, was studied in three groups of patients with primary gout, divided on the basis of alcohol intake. Poor drinkers (A) and good drinkers (B) do not show significant differences in the serum levels of gamma-GT, uric acid and triglycerides. The above parameters are highest in the group of strong drinkers (C), in which the increase in serum gamma-GT activity is statistically significant and reaches values above the normal range.