Can drinking coffee affect the results of a fasting blood sugar measurement?

Yes, drinking coffee can affect the results of a fasting blood sugar measurement.

While the exact impact can vary from person to person, caffeine, the primary active ingredient in coffee, can:

* Increase cortisol levels: Cortisol is a stress hormone that can raise blood sugar levels.

* Stimulate insulin production: This can initially lower blood sugar levels, but it can also lead to insulin resistance over time.

* Affect the body's metabolism: Caffeine can influence how your body processes glucose.

Therefore, it's generally recommended to avoid consuming caffeine for at least 8-12 hours before a fasting blood sugar test. This will help ensure more accurate results.

If you have concerns about your blood sugar levels or are undergoing specific medical tests, it's always best to consult with your healthcare provider for personalized advice.