Hydrogen breath test:

• Do not eat slowly digested foods such as beans, bran or other high fiber cereals the day before the testing.
• Nothing to eat or drink for 12 hours, you may have small sips of water the morning before your test.
• Do not smoke, sleep, or exercise vigorously for at least 1/2 hour before, or at any time during the test.
• Let the Medical Assistant know if you have taken any recent antibiotics and/or therapy or current diarrhea. They can affect the outcome of the test.

Lactose breath test:

• Do not eat slowly digested foods such as beans, bran or other high fiber cereals the day before the testing.
• Nothing to eat or drink for 12 hours, and take 12 oz. of milk three hours before the test.
• Do not smoke, sleep, or exercise vigorously for at least 1/2 hour before, or at any time during the test.
• Let the Medical Assistant know if you have taken any recent antibiotics and/or therapy or current diarrhea. They can affect the outcome of the test.