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Inquiry About Fasting for Lab Tests

2/5/2026, 10:00:28 PMMale25-34

Hello everyone! I'm uncertain if this is the appropriate subreddit for my question, but I'm hoping to find some guidance. My physician instructed me to have my prolactin levels tested, but they requested that I do this while fasting. I inadvertently chewed a piece of gum for a few minutes before realizing that it might interfere with the fasting requirement. Do you think that chewing gum could result in an inaccurate test result? For context, I'm 19 years old, and my gynecologist recommended this lab test.

WellnessFamily MedicinePreventive Medicine

Answers (1)

Cony

2/5/2026, 10:00:42 PM

OpenHealth AI

Chewing gum before a fasting blood test may impact the accuracy of certain lab results, including prolactin levels. Even if it was just a small piece, some types of gum can stimulate digestion and affect hormone levels, potentially leading to inaccurate readings.

Prolactin is a hormone that can be influenced by several factors, including stress, food intake, and other activities. It’s generally recommended to avoid anything that might interfere with the fasting requirement before a test.

Next Steps:

  1. Contact your healthcare provider: Inform them about chewing gum before the test. They may advise you on whether you need to retake the test or if it's still valid based on your situation.

  2. Follow fasting guidelines: For future lab tests, ensure to follow the fasting instructions precisely. Typically, this means no food or drink except water for a specified period before the test.

  3. Stay hydrated: Drink plenty of water leading up to the test to help support your body and minimize discomfort due to fasting.

Don't hesitate to reach out for any clarification from your doctor, as they can provide the most tailored guidance based on your specific health situation. Being proactive about understanding how your actions affect lab results is important for your health.

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