Sulfur dioxide

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

Yes — sulfur dioxide is high in histamine. Sulfur dioxide is the one sulfite additive that is a gas rather than a salt, and sulfites are not documented as inhibitors of DAO, the enzyme that clears histamine. Sulfites are here because their intolerance looks like histamine intolerance and travels in the same foods — not because a mechanism links them. Like every sulfite it carries no histamine of its own; what it brings is the separate sensitivity. Dried fruit that has gone brown is fruit that was not treated. One number is worth carrying over from the additive side: when EFSA re-evaluated the sulfites in 2016 it kept the group ADI at 0.7 mg SO₂ equivalent per kilo of body weight, made it TEMPORARY for want of data, and estimated exposure above that figure for every population group. Amounts vary by brand and recipe, so always check the label of the exact product.