E451 — Triphosphates
E451 (Triphosphates), a emulsifier, is rated "avoid": worth avoiding. An emulsifier and water-binder in processed cheese, sausages, and seafood. It adds to a total phosphate intake that EFSA found already exceeds the safe daily limit for many children, and that is linked to kidney and cardiovascular harm.
What is Triphosphates?
An inorganic phosphate salt used to retain water in processed meats, smooth processed cheese, and stabilise frozen seafood. Common in deli meats, hot dogs, and prepared shrimp.
What does it do to the body?
Same phosphate-load concern as the other added phosphates: it is absorbed efficiently, raising blood phosphate more than food-bound phosphorus does. High intake is associated with kidney strain and with vascular calcification over years. Heavy daily eaters of processed meat and cheese take on the biggest load, and people with reduced kidney function have the least margin.
What regulators say
Covered by EFSA's 2019 group acceptable daily intake of 40 mg of phosphorus per kg of body weight per day, which EFSA found is already exceeded by infants, toddlers and children at average consumption. EFSA states the limit does not apply to people with moderate to severe reduced kidney function. It stays permitted in the EU, and the FDA treats it as GRAS.
Risk rating: Avoid
Known or suspected to cause harm: a substance EFSA or another regulator has flagged, or one restricted in some jurisdictions. Best kept out of a regular diet.
Source: EFSA — re-evaluation of phosphoric acid and phosphates, E 338–341, E 343, E 450–452 (2019) ↗