RÉSUMÉ
Objective Antiaging effects of seal kidney on aged male rats have been studies. Methods: Reproduction system of male rat was damaged by CYP. After ig. seal kidney 30 days, the content of serum T, serum MDA and the activity of SOD were determined. The changes of histology of the testis were observed by microscope with the method of paraffin embedding and H-E staining. Results The contents of serum T not only in normal rat but also in reproduction system damaged rat were markedly enhanced. The function condition of leydig's cells in the testis was improved. The formation and development of spermatozoon were increased. The activity of serum SOD was remarkably raised , while the content of serum MDA was strikingly reduced. Conclusion Seal kidney has the notable antiaging effects.