Gastroparesis in Cystic Fibrosis

Inclusion Criteria: * Patients age 4 years\* and above with a genetically confirmed diagnosis of CF (\*This age was chosen as patients younger than 4 years rarely undergo GES) * Actively being followed at the University of Miami CF Center (i.e. seen within the past 5 years at a University of Miami pediatric or adult pulmonology clinic) Exclusion Criteria: * History of abdominal surgeries involving gastrointestinal luminal resection (i.e. small bowel or colonic resection that increases risk of post-operative strictures or narrowing of the lumen). Nissen fundoplication, gastrostomy tube placement, gynecologic surgeries, appendectomy, and/or cholecystectomy are not excluded. * Gastrointestinal comorbidities that impact absorption such as Inflammatory Bowel Disease and Celiac Disease * Known hypersensitivity to Spirulina, egg, milk or wheat allergens * Patients not able to consume at least 50% of a standard test meal * Pregnant women * Adults unable to consent * Prisoners