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Why must I fast before some medical testing?

Fasting 12 hours before certain kinds of medical testing is recommended by most physicians so that your stomach and digestive contents do not interfere with the results. Also, fasting is recommended before surgery. This ensures that your digestive organs are empty and do not crowd the area being operated on. It also helps to make sure that stomach matter does not get into the chest cavity if your body is affected by weakness from anesthesia.

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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.