Kidney-friendlyOnions is rated Kidney-friendly. Of phosphorus, sodium and potassium, Potassium is highest (6%), all below 15% of limits.
Phosphorus / Sodium / Potassium (rating basis)
Phosphorus27 mg3%
Low
Sodium8 mg<1%
Low
Potassium119 mg6%
Low
About this food
Onions sits in the Vegetables group. 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.
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
Fiber0.9 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 is rated Kidney-friendly: Potassium is 6% of the CKD stage 3-4 limit, the highest item. Individual needs should be discussed with your healthcare team.
Why is Onions rated Kidney-friendly?
Onions's Potassium content (119 mg) equals 6% of the limit, sitting in the <15% band - that is why it rates Kidney-friendly.
How much Potassium is in Onions?
In every 100 g of Onions, Potassium is about 119 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 119 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 (119 mg per 100 g). The tier shown here comes from its own numbers, not the category.