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Fish, swordfish, cooked, dry heat

Per 100 g edible portion
Meat & Protein
Higher riskUsing CKD stage 3-4 limits, Fish falls in the Higher risk tier - Phosphorus (30%) is the main risk source.

Phosphorus / Sodium / Potassium (rating basis)

Phosphorus304 mg30%
High
Sodium97 mg5%
Low
Potassium499 mg25%
Moderate

About this food

About Fish: Animal proteins tend to be higher in phosphorus, and animal phosphorus absorbs at 60-80% versus 30-50% for plants. Choosing low-phosphorus proteins such as egg whites or tofu, or controlling portions of red meat, is a common CKD approach. As a Meat & Protein item, its role in a kidney diet depends mainly on mineral content.

Nutrient insight

Fish's phosphorus is the top contributor (30% of its limit). Source matters: animal phosphorus absorbs at 60-80%, additive phosphorus near 100% - the same number can mean very different real loads.

Other nutrients

Protein23.4 gNot rated; needs attention at stage 4-5
Fiber0 gBeneficial for CKD (core plant-based nutrient)
Sugar (total)0 gNaturally free of sugar
Alcohol0 gAlcohol-free
Purine93.1 mgModerate purineNot rated · category estimate
Oxalate1.5 mgLow oxalateNot rated · category estimate
Phosphorus source: Animal source (higher absorption) · Potassium form: Whole food

Practical tips

Practical tip: Boiling meat first and discarding the water removes some phosphorus and potassium; prefer low-phosphorus proteins like egg whites.

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Related guides

Meat & ProteinHigher risk foodsLow potassium foodsLow phosphorus foods

Frequently asked questions

Is Fish safe for kidney disease?

Based on CKD stage 3-4 daily limits, Fish is rated Higher risk - Phosphorus is the highest contributor at 30% of its limit. Ratings reflect public nutrition data only; individual cases should follow medical advice.

Why is Fish rated Higher risk?

Among phosphorus, sodium and potassium, Fish's Phosphorus is highest (304 mg, 30% of daily limit), falling in the >30% band - hence the Higher risk rating.

How much Phosphorus is in Fish?

Per 100 g, Fish contains Phosphorus 304 mg, which is 30% of the CKD stage 3-4 daily limit (1,000 mg).

Is Fish safe on a low-potassium diet?

On a low-potassium diet, Fish exceeds the 300 mg per 100 g reference point, providing 499 mg of Potassium. Treat this as a reference - your stage and labs decide the real target.

How does Fish compare to other meat & protein foods?

Compared with the typical Meat & Protein food, Fish has more Phosphorus - 304 mg per 100 g on record. Ratings on this site always use the food's own measured values.