Irritable Bowel Syndrome Message Boards | Lactose Malabsorption Testing

I recently underwent testing for lactose "malabsorption" with a hydrogen breath test. The test results came back good and were negative for lactose malabsorption. The test lasted two hours with me ingesting lactose and then blowing into a bag frequently.

I believe I have IBS-C and it seems like my digestion may be slowed. If that is the case, is there a possibility that that may skew the test results? I felt good throughout the testing but experienced bloating, gas, nausea, stomach ache, and some stomach gurgling beginning 4-1/2 hours after I drank the lactose substance. Since I did not have much sleep or food the day before the test, it could be related to that rather than the lactose.

My main question is: could a potentially slowed digestion have any affects on the results of these tests? I am also having a fructose malabsorption test in a couple weeks and would love to hear some input on this matter.

If I did not test positive for lactose malabsorption, and still have trouble with milk, IBS is on a short list of my possiblities.

Thanks a lot

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Likely IBS-C and Fructose Malabsorption
Undiagnosed and going through testing process

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