Abstract
Crude juice of SIDR (Zizyphus Spina--Christi L.) fruits and leaves were obtained by hydraulic press. The levels of polyphenolic compounds in the juice were 510.00 ppm and 722.00 ppm. Aliquots of the concentrated SIDR juice, represent 200 ppm, 400 ppm, 800 ppm and 1,600 ppm and butylated hydroxyl toluene were investigated by Rancimat method at 100 degrees Celsius and 1,1--diphenyl--2--picrylhydrazyl free radical scavenging method. These compounds were administrated to rats daily for 6 weeks by stomach tube. The liver and kidney function tests and serum contents were measured to assess the safety limits of the phenolic compounds in the SIDR juice. The data of the aforementioned measurements indicates that the administration of SIDR juice did not cause any changes in liver and kidney functions. On the contrary, BHT at 200 ppm induced significant increases in the enzyme activities and the serum levels of total lipids, uric acid and creatinine.