Phosphates: why they are in sausage, cottage cheese, and soda

Phosphorus is an essential element: it is a component of bones, cell membranes, and molecules that transport energy. However, added phosphates are one of the few groups of additives where the concern is not the substance itself, but the quantity, and where the distinction between natural and added truly matters.

What they do in a product

In meat products. They retain water: protein binds more moisture, making the product juicier and heavier. This leads to a second, less pleasant function — increasing the yield of the finished product from the same amount of meat.

In processed cheeses. They prevent protein and fat from separating and are responsible for a smooth, spreadable texture.

In dairy products. They stabilize protein during heating so it does not curdle during sterilization.

In soda. Phosphoric acid provides a tart taste that balances the sweetness — a mechanism explained in our article on soda.

In leavening agents. An acidic component that reacts with baking soda.

Codes under which they appear

In ingredient lists, they are often labeled as a "stabilizer" or "acidity regulator" with their name rather than a code — a tactic explained in our article on how additives are hidden.

How added phosphorus differs from natural phosphorus

This is the only meaningful distinction in this topic. Phosphorus from regular food — meat, fish, dairy, legumes, nuts — is bound in organic compounds, and only a portion of it is absorbed, typically about half to two-thirds.

Phosphates added as an additive are in a free, easily accessible form and are absorbed almost completely. In other words, the same milligram of phosphorus "weighs" differently depending on the source.

For a healthy person with normal kidney function, this does not create a problem: the excess is excreted. It becomes significant where excretion is impaired.

Who should monitor their intake

• Those with chronic kidney disease. This is the primary group: with reduced kidney function, phosphorus accumulates, and limiting added phosphates is part of medical nutrition therapy. It is prescribed by a doctor.
• Those taking certain medications — consult your attending physician.

For everyone else, the practical conclusion is more modest: phosphates are a marker that a product is highly processed, and you should look at the product as a whole, not just the label. This sign is analyzed in our article on ultra-processed food.

How this is noticeable in practice

The most obvious case is meat with an injected solution. Phosphates, along with salt, allow a significant amount of water to be retained in the piece, and the buyer pays for it as if it were meat. When cooked, such meat shrinks noticeably and releases a lot of liquid.

This can be checked by the ingredient list: a whole piece of meat should have none of these, but if the list includes water, salt, and stabilizers, you are looking at a semi-finished product. For more on comparing price per kilogram in such cases, see our article on price per kilogram.

What to look for

1. The ingredients of whole meat and fish. There should be nothing there except the product itself.
2. The percentage of meat in products. It is indicated as a percentage — more on this in our article on sausage composition.
3. The amount of soda in your diet. Phosphoric acid is a significant source of added phosphorus with regular consumption.
4. Doctor's orders, if you have kidney disease. This is a case where general recommendations do not apply.

Count it from a photo

Frequently asked questions

Why are phosphates added to sausage?

They retain water: protein binds more moisture, making the product juicier and heavier. The other side of this same function is increasing the yield of the finished product from the same amount of meat.

How do added phosphates differ from natural phosphorus?

By the rate of absorption. Phosphorus from regular food is bound in organic compounds and is absorbed by about half, while phosphates added as additives are in a free form and are absorbed almost completely.

Are phosphates harmful?

For a healthy person with normal kidney function, the excess is excreted and does not cause problems. This becomes significant in cases of chronic kidney disease, where limiting added phosphates is part of a therapeutic diet as prescribed by a doctor.

How to tell if meat contains a solution?

By the ingredients: a whole piece of meat should contain nothing but the product itself. If water, salt, and stabilizers are listed, it is a processed product, and it will shrink noticeably and release a lot of liquid when fried.

Are there phosphates in soda?

Dark carbonated drinks use phosphoric acid, which provides a sour taste that balances the sweetness. With regular consumption, this is a significant source of added phosphorus.

Read next

• How the composition of sausage has changed and what to look for in it now — Sausage is the most convenient product for analyzing how recipes change: the changes are documented by percentages right on the packaging.
• Stabilizers and thickeners: gums, starches, and pectin — Xanthan gum, guar gum, carrageenan, pectin, modified starch — this is a set of words that looks alarming on an ingredient label but means something quite boring: the product needs to have the right consistency and not separate before its expiration date.
• Ultra-processed food: what lies behind the NOVA classification — There is a lot of writing about ultra-processed food right now as if the matter is settled: there is bad industrial food and good homemade food.

This article is for general information. It is not medical advice, a diagnosis, or a prescription for treatment or a diet, and it does not replace a consultation with your doctor. If you have a health condition, are pregnant, take medication, or follow a diet prescribed to you, decisions about food belong with your doctor.

Figures from regulations, guidelines and studies are given as they stood when this article was prepared and may since have changed; check them against the primary sources. This article is not advertising, an offer, or individual advice, and neither the author nor the site owner is responsible for decisions taken on the basis of it.