The Kidney Function Test (KFT) is designed to assess kidney health and function by measuring the levels of various substances in the blood and urine. These tests typically include Serum Creatinine, Blood Urea Nitrogen (BUN), estimated Glomerular Filtration Rate (eGFR), and Urinalysis (checking for protein, red or white blood cells). Creatinine and urea are waste products that healthy kidneys filter and remove from the blood; therefore, elevated levels indicate reduced kidney function. eGFR estimates the kidneys’ filtering capacity based on age, sex, and creatinine level. The presence of protein in the urine (proteinuria) can also indicate damage to the kidney’s glomeruli. These tests are used for the early diagnosis of kidney diseases such as Chronic Kidney Disease (CKD) and Acute Kidney Injury (AKI), monitoring complications of diabetes or high blood pressure, or assessing the effects of certain medications (like chemotherapy). Results must be interpreted alongside the patient’s symptoms, medical history, and other tests (such as electrolytes or imaging). Abnormal levels may necessitate further investigations like a kidney biopsy or treatment adjustments.