In general, there is no rule that you can’t eat breakfast for kidney function test, but patients are not recommended to eat breakfast so as not to affect the test results.
Kidney function test mainly includes blood test, urine routine test, 24 hours urine protein quantitative test and other tests, blood test is mainly to check and urea nitrogen level, creatinine is the product of muscle metabolism and decomposition, if the patient check after breakfast, it may lead to creatinine increase, urea nitrogen increase, which affects the accuracy of the results, so it is not recommended to do the renal function test patients to eat breakfast.
So it is not recommended to have breakfast for kidney function test patients. It is recommended that patients should have a light diet and abstain from alcohol before the kidney function test, and at the same time, they should pay attention to rest and avoid staying up late.