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Home Food Comparisons Onion vs Garlic: Which Is Better for Kidneys?

Onion vs Garlic: Which Is Better for Kidneys?

Side by side, Onion (Kidney-friendly) and Garlic (Moderate) differ most in Potassium: Onion has 146 mg, Garlic has 401 mg. On the three rated minerals, the widest separation is Potassium: 7% of the limit for Onion against 20% for Garlic.

Onion
Kidney-friendly
Garlic
Moderate
Phosphorus
29 mg
3%
153 mg
15%
Sodium
4 mg
<1%
17 mg
<1%
Potassium
146 mg
7%
401 mg
20%

About Onion

Onion (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.

About Garlic

Garlic 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.

Practical tips

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. A handy approach - Slice, boil and discard the water to remove roughly 30-50% of the potassium - a practical method for high-potassium vegetables.

See Onion details See Garlic details

Frequently asked questions

Which has more potassium, onion or garlic?

Onion has 146 mg of Potassium per 100 g, compared with 401 mg in Garlic. Both numbers are measured against the same daily limit.

Is onion or garlic better for kidney disease?

Based on CKD stage 3-4 daily limits, Onion is rated Kidney-friendly and Garlic is rated Moderate. Ratings reflect mineral load per 100 g only; individual advice should come from your healthcare team.

What is the difference between onion and garlic for a CKD diet?

The largest difference is Potassium: Onion sits at 7% of the daily limit versus 20% for Garlic. Portion size changes both numbers, so compare per 100 g values on the food pages.