Fructose malabsorption is more than high fructose corn syrup. It's all sugar, fruit and many vegetables that are really fruit such as cucumbers, peppers and tomatoes basically anything with seeds. I felt better in about 1 day. If you feel better then you eliminate it permently. I have not found a good dietician, was very disappointed in Mayo's dietician, they were not updated on anything and mostly recommend FODMAP diet which allows many foods I can't eat. I've read many good books that have helped me they are listed on my posts but basically I'm on Keto since it's very low carb and whole foods. Just keep in mind doctors treat with meds not diet when diet will change everything and keep you off the meds. I've been able to get off everything I had been on for nearly 20 years.