This study is to evaluate the effect of phosphatidylcholine injection onvisceral fat in dogs. The experiments were carried out in ten dogs usingthe PPC formula of the network lipolysis .The injections delivered to theomentum of dogs through minilaparotomy. After 7 -10 days; omentalbiopsies from the site of injection were taken and examined by lightmicroscope after processing and staining. Follow up postoperatively wasdone by daily pulse and temperature for all dogs. A control half of theomentum and a control omental biopsies before injection were used forcomparison. Complications excluded by peritoneal swabs before injectionand on relaparotomy.Histopathological results show significant lipolysisof visceral fat .while peritoneal swabs show no peritonitis and vital signsfollow up show no significant changes.