The creatinine value of 155 μmol/L after eating breakfast is above the normal range and is abnormal. The normal value of male blood creatinine is 54～106μmol/L, the normal value of female blood creatinine is 44～84μmol/L, and the normal value of pediatric blood creatinine is 24.9～69.7μmol/L. Creatinine is mainly excreted through the kidneys, and after eating breakfast, the value of blood creatinine can be partially different, but the influence of the value will not be too big. Theoretically, some exogenous meats such as chicken, duck, lean pork can also affect creatinine value, because the creatinine produced by metabolism is also a part of blood creatinine, but if the kidney function is normal, the creatinine value will not exceed the upper limit of normal value. If creatinine value is high, you need to be alert and find out the cause of high creatinine as soon as possible and treat the symptoms. If you have elevated creatinine, it is recommended to go to the hospital in time and follow the doctor’s instructions for treatment.