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The Ultimate Guide to How Long to Fast for Blood Work: A Science-Backed Breakdown for Accurate Results

The first time Dr. Eleanor Whitmore, a board-certified endocrinologist, reviewed her patient’s blood work, she noticed something unsettling. The results for a fasting glucose test were wildly inconsistent—one day, perfectly normal; the next, dangerously elevated. After digging deeper, she realized the patient had been sipping black coffee before each draw, unaware that even caffeine could […]

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