The present paper analyses the results obtained in 82 patients with diabetes mellitus of the 2nd type: 59 women and 23 men, between 41 and 74 years old (average +/- DS, 58 +/- 9 years), of which 58 had an index of the body weight higher than 26. The diabetes duration ranged between newly discovered and 11 years. Each patient was given, 3 times a day, a 150 ml cup containing an infusion of the following mixture of plants previously cut into small pieces: Phaseolus vulgaris (pod), Morus alba (leaf), and Vaccinum myrtillus (leaves). The approximate dose used was of about 15 g/day. The treatment lasted for two months. Before and after treatment, the following parameters were determined: Hb Al (Bio-Rex method) in 31 cases; the average of 3 consequent glycemias; the value of glycemia and insulinemia recorded after a standard lunch, consisting of about 40 g glucides, 14 g proteins and 6 g lipids (50 g bread, a boiled egg and a boiled apple of 100 g). Analysis of the results obtained enabled the following temporary conclusions (1). In 74 out of the 82 cases studied, the average values of glycemia, after the treatment with plants, were lower than those recorded before the treatment (the average values of the whole lot: 219 +/- 82 mg/dl before treatment and 166 +/- 76 mg/dl after treatment (2). The overall decrease recorded, of 53 mg/dl, represents 24.3% of the initial value (3).(ABSTRACT TRUNCATED AT 250 WORDS)