Tragacanth

Tragacanth is notable for FODMAPs and oligosaccharides. Clear on lactose, histamine, gluten, fructose, sorbitol, sucrose, tyramine, salicylate, nickel and oxalates.

Yes — Tragacanth is high in FODMAPs. Tragacanth is a dried shrub exudate, and if you have learned that FODMAPs are short-chain carbohydrates this level will look wrong. It is not: the criterion that matters is whether gut bacteria ferment it, not how long the chain is. Inulin runs to sixty sugar units and is still a FODMAP. These gums ferment, which is exactly why they thicken in the gut and produce gas. The criterion is fermentability rather than chain length, and that is Gibson and Shepherd's definition: a long chain that ferments slowly is not the problem; a short one that ferments fast in the proximal colon is.

Yes — Tragacanth is high in oligosaccharides. Tragacanth is a plant exudate used as a thickener, and a substantial fraction of it ferments. Chain length would put it outside the oligosaccharides; behaviour in the colon puts it inside, and behaviour is what the level reflects. Amounts vary by brand and recipe, so always check the label of the exact product.