Quick Answer
It depends on which tests are ordered. A fasting lipid panel and fasting glucose both require 8 to 12 hours of no food (water is fine). Most A1C tests, comprehensive metabolic panels, thyroid panels, and CBCs do not require fasting. When you schedule, we'll tell you exactly what to do based on your specific visit type — and if you forgot to fast, we'll usually reschedule the test rather than run it incorrectly.
This question comes up frequently for patients researching lab tests & diagnostics at Good Health NC in Knightdale, NC.
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