The aim of this study was to investigate the effects on metabolism and body weight of aluminum added to ration of broilers. Day-old thirty broiler chicks were divided into two equal groups and fed for 40 days. The broilers in experimental group were fed with dietary supplementation of 2 g/kg aluminum as aluminum sulfate and broilers in control group were fed with supplementary dietary sodium sulfate containing sulfate equal to those supplied by aluminum sulfate in diet of experimental group. In days 20 to 40 of experimental period, the broilers were weighed, and blood samples were taken with vacutainer tubes. In obtained sera, ALP, CK, gamma-GT, total and direct bilirubin, albumin, Ca, Pi, glucose, triglyceride, cholesterol, uric acid analyses were done spectrophotometrically.