Positives

• Patients in microbiome-focused communities use inulin powder as a targeted prebiotic to support gut health protocols Mayo Clinic Connect.

Negatives

• Inulin is a fructan FODMAP, and patients with IBS, SIBO, or general FODMAP sensitivity commonly experience bloating, gas, abdominal pain, and diarrhea even at small doses (0.5-1 g); doses above 10 g/day cause symptoms in even healthy people. Theibsdietitian.
• Patients with SIBO commonly report worsening of bloating and pain when adding inulin because the bacterial overgrowth ferments the fructan rapidly in the small intestine, producing hydrogen and methane that drive distension. Foodmarble.
• Refined inulin extracted from chicory or Jerusalem artichoke produces more GI distress than inulin in food sources, making powdered supplements particularly likely to trigger flares in Long COVID patients with co-existing gut dysbiosis. Fodmapeveryday.

Hurdles & Side Effects

• Severe gastrointestinal distress and brain fog are reported by sensitive individuals in Long COVID communities Reddit.
• ME/CFS patients frequently link adverse inulin reactions to SIBO-like sensitivities and dysbiosis concerns Reddit.