If you have advanced CKD, controlling phosphate is one of the most important — and most overlooked — ways to protect your bones and blood vessels. The trouble is that the highest-phosphate foods often look perfectly innocent on the shelf.
Two kinds of phosphate
Phosphate in food comes in two forms:
- Organic phosphate from natural sources (meat, fish, dairy, beans). Around 40–60% is absorbed.
- Inorganic phosphate added by food manufacturers as a preservative or texture agent. Up to 100% is absorbed.
Spotting it on UK labels
UK and EU food labelling requires phosphate additives to appear in the ingredients list. Look out for:
- E338 phosphoric acid
- E339–E343 sodium, potassium, calcium phosphates
- E450, E451, E452 polyphosphates
- The words "phosphate" or "phosphoric acid"
They are common in cola drinks, processed cheese slices, ham, bacon, sausages, instant noodles, ready-meals, baking powder and some breakfast cereals.
Practical steps
- Choose fresh meat over reformed/processed meats.
- Choose hard cheese (small portions) over processed cheese slices.
- Swap cola for water, squash or tea.
- Cook from scratch where possible; ready meals are a major source.
Phosphate binders
If your renal team has prescribed a phosphate binder (such as calcium acetate, sevelamer or lanthanum), take it with the meal — not afterwards — for it to work properly. The Renal Pharmacy Group has clear UK-specific guidance on timing.