Do you really need to fast before every blood test? New study suggests not

Even a routine blood test may come with an overnight fasting requirement. Many medical practices still ask patients to go without food for 8–12 hours before blood is drawn. While the protocol was originally recommended for glucose and lipid testing, over time, it became the default requirement for almost all routine blood panels. Why it is still followed for such a broad range of routine lab tests is a question that researchers from South Korea asked in a recent study.

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