CKD Daily Limit Impact
Based on CKD Stage 3-4 daily limits
Vegetables
Safe
Onions
Nutrition facts & CKD safety rating per 100gram serving
Serving Size
100.0 gram
Calories
38 kcal
Protein
0.9 g
Carbs
8.5 g
Fat
0.1 g
Phosphorus Learn more →
33 mg
Sodium Learn more →
1 mg
Potassium Learn more →
171 mg
Source & Notes
USDA FNDDS (foodCode: 75117020)
Frequently Asked Questions
Is Onions safe for people with kidney disease?
Onions is rated Safe for CKD patients. Good choice for kidney disease patients. With 33.0mg phosphorus, 1.0mg sodium, and 171.0mg potassium per 100.0g serving, it can be enjoyed in normal portion sizes. Always confirm with your nephrologist or renal dietitian.
How much phosphorus is in Onions?
A 100.0g serving of Onions contains 33mg of phosphorus, which is approximately 3% of the recommended 1,000mg daily limit for CKD Stage 3-4 patients.
How much sodium is in Onions?
Per 100.0g serving, Onions provides 1mg of sodium — about 0% of the 2,300mg daily sodium limit recommended for kidney patients.
How much potassium is in Onions?
Onions contains 171mg of potassium per 100.0g serving, equivalent to about 9% of the daily 2,000mg potassium limit for CKD Stage 3-4 patients.
Can dialysis patients eat Onions?
Dialysis patients have stricter mineral limits. Given Onions is rated Safe (Good choice for kidney disease patients), it is generally a good choice for dialysis patients in normal portions. 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