Potassium nitrite

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

Potassium nitrite contains only low levels of FODMAPs. Potassium nitrite is a curing salt, and there is no fermentable carbohydrate in it.

Potassium nitrite contains only low levels of histamine. Potassium nitrite is a curing salt for meat, and the meat it cures is where this axis has its question.

Potassium nitrite contains only low levels of oligosaccharides. Potassium nitrite is a mineral salt, and salts have no carbohydrate chemistry at all. What is worth checking is the curing mix it comes in, which often carries dextrose as a carrier - glucose, a single unit, and never an oligosaccharide.

Potassium nitrite contains only low levels of salicylate. A curing salt for meat. Its relevance is to nitrites and amines rather than salicylate, though cured meats often carry both concerns. Amounts vary by brand and recipe, so always check the label of the exact product.