In 48 men, 42, 1 +/- 8.8 yrs old, with untreated mild essential hypertension, serum uric acid, total cholesterol triglycerides and glucose were examined at 8 a.m after 16 hour overnight fasting. All patients were overweight, with body mass index: 26.9 +/- 2.4 kg/m2, (normal value: 19-24.9); serum uric acid 293.1 +/- 89.3 mmol/l; cholesterol 6.3 +/- 1.4; triglycerides 2.0 +/- 1.3 and glucose 5.4 +/- 0.9 mmol/l. File out of 48 (10.4%) patients had hyperuricemia, nine (18.7%) had hypercholesterolemia, twenty (41.7%) had hypertriglyceridemia and 19 (39.6%) had hyperglycemia. Significant correlation between serum uric acid and triglycerides only (r = 0.35; p < 0.01), was found. A correlation exists between the diastolic blood pressure and cholesterol (r = 0.35; p < 0.01); as well as, between mean arterial blood pressure and cholesterol (r = 0.34; p < 0.02). Only three out of 48 (6.2%) patients with hypertension had all four biochemical parameters above normal levels. Our results suggest that interrelation of all these metabolic disorders are important in essential hypertension, and especially the association of high serum uric acid and triglyceride level.