Maltitol

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

Yes — Maltitol is high in FODMAPs. Maltitol is the polyol chosen to replace sugar in sugar-free chocolate, because it melts and tastes close to sucrose. About half of it is absorbed and half reaches the colon - which is why a sugar-free bar has a reputation the manufacturers would rather it did not.

Yes — Maltitol is high in sorbitol. Maltitol is a polyol, and the one used to replace sugar in "sugar-free" chocolate. It behaves like sorbitol in the gut, so a sorbitol profile flags it even though the name differs.

Maltitol contains only low levels of nickel. Maltitol carries a trace of nickel for a reason written into the law that governs it. E 965 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. That is a legal CEILING and not a content: what a given batch actually holds is not published, and the exact figure for this one is not quoted. But a ceiling exists because a trace is expected. Amounts vary by brand and recipe, so always check the label of the exact product.