Kidney-friendlyOn a stage 3-4 CKD basis, Onions's Kidney-friendly rating is driven by Potassium (6%) - none of the three minerals exceeds 15%.
Phosphorus / Sodium / Potassium (rating basis)
Phosphorus22 mg2%
Low
Sodium12 mg<1%
Low
Potassium124 mg6%
Low
About this food
Onions (Vegetables). Vegetables are a key source of fiber and vitamins and are beneficial in CKD. Some are high in potassium, but slicing, boiling and discarding the water can remove about 30-50% of the potassium - a practical step. This is the same lens used for similar items.
Nutrient insight
Potassium is the highest of the three at 6%. With reduced kidney function, blood potassium can rise, so spread high-potassium foods across the day rather than in one large serving.
Other nutrients
Protein0.8 gNot part of rating
Fiber1.8 gBeneficial for CKD (core plant-based nutrient)
How to eat it more safely: Slice, boil and discard the water to remove roughly 30-50% of the potassium - a practical method for high-potassium vegetables.
Onions scores Kidney-friendly on the phosphorus/sodium/potassium assessment, led by Potassium (6% of limit). This site presents data, not medical judgment.
Why is Onions rated Kidney-friendly?
The reason: Potassium (124 mg, 6%) is the most prominent of Onions's three minerals, at the <15% level, which maps to Kidney-friendly.
How much Potassium is in Onions?
In every 100 g of Onions, Potassium is about 124 mg - roughly 6% of the daily limit (2,000 mg).
Is Onions safe on a low-potassium diet?
For people watching potassium, Onions falls below 300 mg per 100 g, with Potassium at 124 mg. Confirm your personal limit with your nephrologist or renal dietitian.
How does Onions compare to other vegetables foods?
Against the Vegetables average, Onions shows less Potassium (124 mg per 100 g). The tier shown here comes from its own numbers, not the category.