Sorbitol

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

Yes — sorbitol is high in FODMAPs. Sorbitol is the P of the acronym and the one the family is named after. It occurs naturally in stone fruit - pear, plum, apricot - which is why those fruits are high even when their fructose is balanced. As an additive it carries a legal warning above ten percent, which tells you what dose is at stake.

Yes — sorbitol is high in sorbitol. This is sorbitol itself, listed as E420. Above 10% added polyols a product must carry the warning that excessive consumption may have laxative effects - that labelling requirement is the clearest measure of the dose involved.

Sorbitol contains only low levels of nickel. Sorbitol carries a trace of nickel for a reason written into the law that governs it. E 420 is made by CATALYTIC HYDROGENATION and the catalyst is nickel - the regulation says so in its own text - so its purity criteria carry a nickel limit of 2 mg/kg on the dry weight basis. That is a legal CEILING and not a content: what a given batch actually holds is not published, and 2 mg/kg is an order of magnitude below the foods that lead this axis. But a ceiling exists because a trace is expected. Amounts vary by brand and recipe, so always check the label of the exact product.