Black Walnuts is Avoid for kidney disease patients
Avoid or eat rarely if you have CKD · Verified against USDA & KDOQI guidelines.
🍿
CKD Daily Limit Impact
Phosphorus
51%
Sodium
0%
Potassium
26%
Based on CKD Stage 3-4 daily limits
🍿 Snacks Avoid

Black Walnuts

Nutrition facts & CKD safety rating per 100gram serving

Serving Size 100.0 gram
5gram ← drag to adjust → 500gram
Calories
633 kcal
Protein
23.3 g
Carbs
10.0 g
Fat
60.0 g
Phosphorus Learn more →
513 mg
51% of 1,000mg daily CKD limit
0 mg
0% of 2,300mg daily CKD limit
Potassium Learn more →
523 mg
26% of 2,000mg daily CKD limit
Verdict: Avoid for CKD

Black Walnuts contains levels that significantly exceed CKD-friendly thresholds. Avoid this food regularly. If you must eat it (e.g., on a special occasion), keep portions tiny and adjust the rest of your day accordingly.

Always confirm with your nephrologist or renal dietitian — individual CKD stages and lab values vary.

Source & Notes

USDA Branded (fdc_id: 2488903) · Modern Candles

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Frequently Asked Questions

Is Black Walnuts safe for people with kidney disease?
Black Walnuts is rated Avoid for CKD patients. Avoid or eat rarely if you have CKD. With 513.0mg phosphorus, 0.0mg sodium, and 523.0mg potassium per 100.0g serving, it is best avoided or eaten only on special occasions. Always confirm with your nephrologist or renal dietitian.
How much phosphorus is in Black Walnuts?
A 100.0g serving of Black Walnuts contains 513mg of phosphorus, which is approximately 51% of the recommended 1,000mg daily limit for CKD Stage 3-4 patients.
How much sodium is in Black Walnuts?
Per 100.0g serving, Black Walnuts provides 0mg of sodium — about 0% of the 2,300mg daily sodium limit recommended for kidney patients.
How much potassium is in Black Walnuts?
Black Walnuts contains 523mg of potassium per 100.0g serving, equivalent to about 26% of the daily 2,000mg potassium limit for CKD Stage 3-4 patients.
Can dialysis patients eat Black Walnuts?
Dialysis patients have stricter mineral limits. Given Black Walnuts is rated Avoid (Avoid or eat rarely if you have CKD), dialysis patients should consult their dietitian before consuming this food. Your dialysis team can give you personalised portion advice.

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Last updated: April 18, 2026 · Data source: USDA FoodData Central & KDOQI guidelines