Acetic acid

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

Yes — Acetic acid is high in histamine. Acetic acid as an additive is usually synthetic and carries no histamine at all. What it signals is the other kind: where acetic acid occurs naturally - vinegar, pickles, sourdough - bacteria have been at work, and histamine follows the bacteria. Judge the food, not the acid on the label.

Acetic acid contains moderate levels of salicylate. Acetic acid is vinegar's acid and is not structurally related to salicylate. Vinegar-heavy foods are commonly restricted alongside salicylates, which is why it appears here.

Acetic acid contains only low levels of tyramine. Acetic acid is the acid of vinegar, in purified form, and it contains no tyramine. It sits higher on the histamine axis than here, which is not a contradiction: that axis counts liberators - things that make the body release its own histamine - while this one counts content only. There is no tyramine liberator, because the body stores none to release. Amounts vary by brand and recipe, so always check the label of the exact product.