Triphosphates

Triphosphates — sodium triphosphate and potassium triphosphate — are linear phosphate polymers with three phosphate units linked in a chain. They function as sequestrants, emulsifying salts, acidity regulators, and moisture-retaining agents in processed meats, seafood products, processed cheese, and canned fish. They improve water-holding capacity, texture, and shelf stability. As raising agents in combination leavening systems, they react with sodium bicarbonate to release carbon dioxide.

JECFA's ADI is 70 mg per kilogram body weight per day as phosphorus, evaluated in 1982, shared with all food phosphates. Triphosphates are hydrolysed in the body to orthophosphate before absorption. The same cumulative phosphate intake considerations that apply to all phosphate additives (E338 through E343, E450, E452) apply equally to triphosphates. High dietary phosphate intake from all sources is associated with cardiovascular and renal burden, particularly in people with chronic kidney disease.

Triphosphates are approved in the EU, US (GRAS), UK, and globally. They are widespread in processed seafood, deli meats, and processed cheese. Consumers concerned about phosphate intake — especially those with kidney disease — should be aware that triphosphates contribute to total dietary phosphate load alongside all other phosphate additives and naturally occurring phosphate in food. Choosing minimally processed whole foods reduces total phosphate exposure.