Blood creatinine is normalized after not eating meat, it may be normal phenomenon or it may be caused by renal insufficiency. Creatinine is the product of muscle metabolism in the body, such as excessive consumption of meat products, resulting in the production of large amounts of creatinine in the body, creatinine may be elevated, generally a normal phenomenon, can be restored to normal after improving dietary habits. Therefore, normal creatinine after not eating meat may be a normal phenomenon. Renal insufficiency, mainly due to various reasons caused by glomerular filtration rate decline, resulting in the body to produce waste can not be metabolized out of the body, so creatinine appears to be elevated, because creatinine is mainly produced by meat metabolism, such as stopping the use of meat, the source of creatinine in the body is reduced, or creatinine may be normal, but does not mean that the kidney function is normal. It is recommended that people with abnormal creatinine level should go to the hospital in time, complete the relevant examinations under the guidance of the doctor, and if it is caused by pathological factors, it should be actively treated.