Spinach vs Corn: Which Is Better for Kidneys?

For a kidney-friendly diet the question is mineral load: Spinach is Limit, Corn is Kidney-friendly. Corn carries the lighter mineral load overall, driven mainly by Potassium (6% vs 28% of the limit).

Spinach
Limit Corn
Kidney-friendly

Phosphorus

49 mg

41 mg

Sodium

79 mg

163 mg

Potassium

558 mg

28%

116 mg

See Spinach details See Corn details

Frequently asked questions

Which has more potassium, spinach or corn?

Per 100 g, spinach contains 558 mg and corn contains 116 mg of potassium.

Is spinach or corn better for kidney disease?

Based on CKD stage 3-4 daily limits, spinach is rated limit and corn is rated kidney-friendly. Ratings reflect mineral load per 100 g only — individual advice should come from your healthcare team.

What is the main difference for a CKD diet?

The largest difference is potassium: corn sits at 6% of the daily limit versus 28% for spinach. See each food page for the full mineral profile.