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Spinach vs Lettuce: Which Is Better for Kidneys?

Looking at the three rated minerals, Spinach lands in the Limit tier and Lettuce in the Kidney-friendly tier. If you are choosing between them, Lettuce leaves more room in the daily allowance — the Potassium gap is 7% versus 28%.

Spinach
Limit Lettuce
Kidney-friendly
Phosphorus
49 mg
5%
20 mg
2%
Sodium
79 mg
4%
10 mg
<1%
Potassium
558 mg
28%
141 mg
7%

About Spinach

Spinach belongs to the Vegetables category. 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.

About Lettuce

For Vegetables, Lettuce is a typical example. 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

Practical tip: 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 Spinach details See Lettuce details

Frequently asked questions

Which has more potassium, spinach or lettuce?

By weight, Spinach provides 558 mg of Potassium per 100 g; Lettuce provides 141 mg. That is the main mineral gap between them.

Is spinach or lettuce better for kidney disease?

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

What is the difference between spinach and lettuce for a CKD diet?

The largest difference is Potassium: Lettuce sits at 7% of the daily limit versus 28% for Spinach. Portion size changes both numbers, so compare per 100 g values on the food pages.