Breath Test Preparation

This page provides general information only. Always follow the instructions from your clinician or testing laboratory.

Before the Test

Ask your clinician or laboratory about:

• antibiotics
• probiotics
• laxatives
• stool softeners
• promotility medications
• colonoscopy preparation
• diet restrictions
• fasting requirements
• smoking, exercise, and sleep during the test period

Why Preparation Matters

Breath testing is sensitive to preparation. Incorrect preparation can make the result difficult to interpret.

Day of the Test

Bring or confirm:

• test kit or appointment details
• timing instructions
• medication instructions
• contact information for questions
• list of recent antibiotics or procedures

After the Test

Ask when results will be available and who will interpret them. Breath test interpretation should be connected to symptoms, risk factors, and the broader clinical picture.