Phosphate labels and kidney diets: compare total phosphorus
Prepared by TengRip · Sources checked: 2026-10-14
Dicalcium phosphate, tricalcium phosphate, sodium hexametaphosphate and dipotassium phosphate are distinct names. Useful diet comparisons need total phosphorus on a comparable basis.
Other common names: 磷酸鹽與腎病飲食：怎麼比較總磷, dicalcium phosphate, sodium hexametaphosphate, dipotassium phosphate, tricalcium phosphate
Names and function
The list identifies a phosphate, not its amount or every phosphorus source. Absence does not prove low phosphorus; presence alone does not prove a diet unsuitable.
What the label can and cannot show
Wet and dry foods contain different water amounts. If both figures are as-fed: dry-matter phosphorus % = as-fed phosphorus % ÷ (100 − moisture %) × 100. The table is arithmetic practice, not intake advice.
A practical checking process
Request typical total phosphorus, moisture and calories for the exact product. Confirm as-fed, dry matter or per 100 kcal, and average versus a guaranteed limit before comparing.
Individual and evidence limits
Bring the full diet, treats and supplements to your vet. Unit conversion cannot set an individual target or replace a kidney-diet plan based on the patient and blood phosphorus.
Example: lower as-fed % may mean higher dry-matter phosphorus
| Example | As-fed phosphorus | Moisture | Dry-matter phosphorus |
|---|---|---|---|
| Wet A | 0.3% | 75% | 1.2% |
| Dry B | 0.9% | 10% | 1.0% |
A: 0.3 ÷ 25 × 100 = 1.2%; B: 0.9 ÷ 90 × 100 = 1.0%. Match the basis, then consider calories, overall nutrition and the patient.
Sources
For reference only, not medical advice. If poisoning is suspected, seek veterinary care immediately.
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