Potassium propionate

Potassium propionate is the potassium salt of propionic acid, functioning as an antifungal and antibacterial preservative in bread, baked goods, and dairy products. It is used less frequently than sodium propionate (E281) or calcium propionate (E282) but is valued in reduced-sodium formulations, where replacing sodium-based preservatives with potassium equivalents can help lower the overall sodium content of a product.

JECFA's ADI for potassium propionate is "not specified," evaluated in 1973, consistent with the entire propionate family. It dissociates in the gut to propionic acid — a normal human metabolite — and potassium. The potassium contribution at food additive concentrations is nutritionally insignificant for healthy adults. People with renal disease who must restrict potassium intake should be aware of potassium-containing additives, though the amounts from propionate use are generally small.

Potassium propionate is approved in the EU, US (GRAS), UK, and most global markets. Its use is growing in bread and bakery products reformulated for reduced sodium content. For healthy consumers, it offers the same excellent safety profile as all propionate preservatives while contributing slightly to dietary potassium — a mineral most people do not need to restrict. There are no specific health concerns beyond those shared with the broader propionate group.