Do you need to fast for a comprehensive metabolic panel?

Yes, you typically need to fast before undergoing a comprehensive metabolic panel (CMP) blood test. Some of the components measured in a CMP, such as glucose and triglycerides, can be affected by recent food intake and may produce inaccurate results if you have not fasted.

The standard fasting period for a CMP is usually between 8 and 12 hours. During this time, refrain from eating solid foods or drinking sugary beverages. However, water is allowed and generally encouraged to maintain hydration.

It's always important to follow the specific instructions provided by your healthcare provider or the laboratory when preparing for a CMP. For instance, certain medications or conditions may require different fasting guidelines or considerations. Therefore, clear communication with your doctor or lab is crucial to ensure accurate test results.