Brand, flavour, pack size, full ingredients list? Do you fast before and after each pack? Chew every mouthful thoroughly? Add to detailed food and symptom diary (p.187), post on Insta?
All plant wholefoods contain some prebiotic fibre and/ or resistant starch. BUT some crisps are sliced whole potatoes with or without skins, some made with processed dehydrated potato plus a sundry processed grains …
Then there is the effect of the fatty acids in the frying oil on the gut lining and flora … Inflammatory omega-6? Monounsaturated? Artificial trans fats?
And what about the flavourings? Emulsifiers? Sugars? Page 157 dude.