this looks like it causes problems to only certain people. not everybody.
but there is no indication as to how you can tell whether inulin will cause you problems or not.
https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0221828
“Here, we show that inulin increases beneficial microbiota and decreases harmful microbiota in the feces of young, asymptomatic APOE4 transgenic (E4FAD) mice and enhances metabolism in the cecum, periphery and brain, as demonstrated by increases in the levels of SCFAs, tryptophan-derived metabolites, bile acids, glycolytic metabolites and scyllo-inositol. We show that inulin also reduces inflammatory gene expression in the hippocampus. This knowledge can be utilized to design early precision nutrition intervention strategies that use a prebiotic diet to enhance systemic metabolism and may be useful for reducing AD risk in asymptomatic APOE4 carriers.”
C.M. You should also avoid burdock root and rhubarb. (Which is generally not a problem for most people!)