This study is testing if a medicine called Sucraid® can help kids (6 months to 17 years) who have trouble digesting certain sugars. This is called Congenital Sucrase-Isomaltase Deficiency (CSID). The study will check how well Sucraid® works for kids with different levels of an enzyme called sucrase, which breaks down sugar. Participants need to have had a test called an EGD (esophagogastroduodenoscopy) in the last year to measure sucrase levels. Symptoms like stomach pain, gas, or diarrhea are common in kids with CSID. The study lasts 7 days and includes a few visits to the doctor.

• Length: The study lasts 7 days.
• Eligibility: Children 6 months to 17 years old with specific sucrase levels and symptoms. Must be U.S. residents.
• Risks: Cannot participate if allergic to ingredients in Sucraid® or have other major health issues.

Participants will need to bring a mobile device for completing study tasks. Pregnant or breastfeeding girls cannot join. If your child has used Sucraid® before or has other major health concerns, they cannot participate. This study helps understand how Sucraid® can help with CSID symptoms and its relationship with genetics.