Titanium dioxide

Titanium dioxide (E171) has no histamine route at all - it is an inorganic mineral pigment with no amine chemistry of any kind. It is on this list because SIGHI lists additives by families, and what that list publishes is a compatibility rating. Its real question is a different one, and it is worth saying what the answer rested on. The EFSA's 2021 opinion found no adverse effect on general or organ toxicity up to 1,000 mg/kg of body weight a day, and none on reproduction or development at the same dose — the highest tested. What could not be ruled out was genotoxicity: the particles can break DNA strands and damage chromosomes, no threshold could be assumed and no safe particle size identified. On that alone it can no longer be considered safe as a food additive, and the EU withdrew the authorisation the following year. That belongs to the Wellness Path.

Titanium dioxide has no tyramine route either, and for an even simpler reason: it is an inorganic mineral pigment with no amino acid, no protein and no organic chemistry at all. Its real question — the EFSA's 2021 conclusion, which turned on genotoxicity that could not be ruled out rather than on any toxicity found, and the EU withdrawal that followed — belongs to the Wellness Path.

Titanium dioxide carries no salicylate: salicylates are plant compounds and this is a mineral whitener with no chemical relation to them. If you have seen it excluded on a salicylate diet, that is because such protocols often remove additives as a block, which is a rule about the protocol rather than a fact about the molecule.

Titanium dioxide: no FODMAPs. The acronym covers fermentable carbohydrates, and fermentation needs something for gut bacteria to eat. A mineral pigment gives them nothing: it passes through unabsorbed and unfermented, so it cannot draw water into the bowel or produce gas.

Titanium dioxide: none — this is a mineral pigment with no connection to milk. It is listed here only because the name gets confused with dairy additives.

Titanium dioxide carries no oligosaccharide: they are short chains of sugar units - fructans, galactans and the like. This is an inorganic compound of titanium and oxygen, with no sugar unit to chain in the first place.

No sorbitol, and no route to it: this is an inorganic mineral pigment, titanium and oxygen, with no carbohydrate of any kind. Sorbitol is a sugar alcohol, so there is nothing here for it to be, at any dose and in any product.

Titanium dioxide: no fructose. Fructose is a simple sugar, and this pigment contains no sugar at all - nothing to absorb badly, and nothing to sit in the small intestine unabsorbed.