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Fish, flatfish (flounder and sole species), raw

Per 100 g edible portion
Meat & Protein
LimitFish is rated Limit. Phosphorus is 25% of its limit, near the caution line - control single portions.

Phosphorus / Sodium / Potassium (rating basis)

Phosphorus252 mg25%
High
Sodium296 mg15%
Low
Potassium160 mg8%
Low

About this food

Fish sits in the Meat & Protein group. 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.

Nutrient insight

Phosphorus at 25% is the highest item. Additive phosphorus in processed foods absorbs best; naturally occurring phosphorus is more controllable.

Other nutrients

Protein12.4 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

If you are managing mineral intake: 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 & ProteinLimit foodsHigh fiber foodsLow phosphorus foods

Frequently asked questions

Is Fish safe for kidney disease?

Combining phosphorus, sodium and potassium, Fish falls in the Limit tier, with Phosphorus (25%) contributing the most. Plan meals with your doctor's guidance.

Why is Fish rated Limit?

The deciding factor is Phosphorus: 252 mg, 25% of the limit, in the 25-30% band - so Fish is rated Limit.

How much Phosphorus is in Fish?

Fish's Phosphorus content is 252 mg per 100 g - 25% of the daily limit of 1,000 mg.

Is Fish safe on a low-potassium diet?

If you are on a potassium-restricted diet, Fish falls below 300 mg per 100 g - Potassium comes in at 160 mg. Always verify against your own daily limit.

How does Fish compare to other meat & protein foods?

How does Fish compare within Meat & Protein? Its Phosphorus (252 mg per 100 g) is more than the category average. The rating below is calculated from this food's own data.