Inclusion Criteria:  Have completed Phase I of the CANDI-hEDS study Diagnosis of hEDS / HSD according to physical examination and history taking Diagnosis of Functional Dyspepsia and / or Irritable Bowel Syndrome according to Rome IV criteria Able and willing to give informed consent Access to video conferencing and a smart phone device Able to travel to the Wingate Institute  Exclusion Criteria:  Dependent upon artificial feeding (parenteral and enteral) Structural gastrointestinal disease Any chronic health condition which already requires a restricted diet e.g. diabetes mellitus Functional vomiting disorder with associated weight loss Multiple Type I hypersensitivity reactions to food groups (i.e. anaphylaxis, urticaria, respiratory symptoms or positive RAST tests). Previous or current severe mental health disorder (e.g. severe depression with suicidal ideation) Previous or current eating disorder Positive screen for avoidant restrictive food intake disorder (ARFID)