Can you help me understand if it's okay to drink water before getting a non-fasting blood sugar test? I'm also wondering if it's necessary to wait a full 2 hours, or is an hour and a half sufficient before getting it checked?

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Dr Dhankecha Dineshbhai

General Practitioner

MBBS
6+ Yrs

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For a non-fasting blood sugar test, you can drink water, but avoid eating anything for at least 1-2 hours before the test; however, if you've had a meal, waiting for 2 hours is ideal, but 1.5 hours may also be acceptable, consult with your healthcare provider or lab technician for specific guidance.

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Answered 04/07/2025

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Drinking Water Before Test:
- It's perfectly fine to drink water before a non-fasting blood sugar test. Water does not affect blood sugar levels and helps keep you hydrated.
Timing for Blood Sugar Test:
- The standard recommendation is to wait about 2 hours after eating for a post-meal blood sugar test. This provides an accurate measurement of how your body manages glucose.
- Waiting only 1.5 hours might not fully reflect peak blood sugar levels, which typically occur around 2 hours post-meal.
General Advice:
- Follow any specific instructions from your healthcare provider.
- If unsure, sticking to the 2-hour window is generally advised for reliable results.

Key Points:

Drinking water is safe and encouraged.
The 2-hour wait is standard for non-fasting blood sugar tests.
Consult your doctor for personalized advice if needed.

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