MARSH 1 inflammation can be caused by a number of different things, including early Celiac Disease. But other food allergies or dysbiosis in the gut can also do this...as can other diseases/conditions (IBD, etc.).
The FODMAP diet is good to try, but also should consider breath tests for h. pylori and SIBO...
Chronic Lyme, Bart., Gluten & Sulfite Sensitivity, Many Food/Inhalant/Medication/Chemical Allergies & Intolerances, Asthma, Gut dysmotility & non-specific inflammation, Lupus, Osteoporosis, etc.; G-Tube; TPN-dependent
Meds: Flagyl, Zofran, Essential Oils, etc.