Yes, in most cases, a Calcitonin Test requires fasting. Fasting for a specific duration, typically overnight, is recommended before the blood sample is collected for calcitonin measurement. Fasting helps ensure accurate results by minimizing the potential influence of recent food intake on calcitonin levels. It is important to follow the fasting instructions provided by the healthcare provider or the laboratory conducting the test. However, it is always advisable to consult with the healthcare professional who ordered the test to get precise instructions regarding fasting requirements for the Calcitonin Test.