Thank you for the info on breath tests. Many GI doctors are not enlightened about these tests. My GI doctor, for example, diagnosed me with SIBO based on symptoms and called the breath tests unreliable. My nutritionist subsequently said she wished the doctor had ordered them when I was symptomatic so we could have known for sure. All this is less important to me now because I am doing better, but I would have insisted on a breath test then if I knew then what I know now.