Why are people required to fast before a blood test?

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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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Hello, this is Saikrishna Nagunuri. Recently I have given my blood and urine samples for a regular check-up. In the blood report they mentioned normochromic and normocytic. Blood sugar level in fasting is also on the borderline. I had food late at night and waited on an empty stomach for some time to give samples. In the urine report they mentioned reduced sugar and protein trace. Please find the attached reports and suggest if any diet or medication needs to be followed. As I am a software professional, I worked long hours for the last two weeks due to heavy workload. Most of my job involves sitting for long hours. These days I am feeling fatigue after work and also feeling drowsy. Thank you in advance. Regards, Saikrishna.

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