Hello, I am the mom of a 13 yr old boy with fructose malabsorption. He was finally diagnosed at Mayo 1st week of June 2018. He finally became pain free once we eliminated fructans, although I did not realize there are fructans in potato skins! Regarding L-alanine, how much do you take per body weight? do you need to take it on an empty stomach before you eat food? We have had no help in re-introducing foods. Dieticians repeatedy tell us "everyone is different, you just have to try." When my son has even 3 bites of a food, he reacts 6 hrs later and is laid up with abdominal pain, weakness and severe constipation for 5-6 days. As a mom, it is very sad to see my son curled up for so long and he is missing school. Do you have any suggestions on how to choose foods to re-introduce and how to decrease the likelihood of a reaction? Thank you!!