Why are people required to fast before a blood test?

Answered by 1 Apollo Doctors

Dr Kamran Mohammed

General Practitioner

MBBS
FIDM
5+ Yrs

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Food nutrients can interfere with the test especially in the case of fasting blood glucose hence it is advised to remain empty stomach before giving the test.

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Answered 24/07/2025

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Is there any other tool to detect diabetes other then blood test?

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Today, I received my blood test report, and my fasting blood sugar level is 107. This is the first time my sugar level has been high; two months ago, it was only 80. I am 30 years old and have been using some hormone medications for infertility over the past two months. What tests should I get done now, and does this mean I am diabetic?

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I fasted for 18 hours. Will that affect my blood test?

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