What is a renal diet?

A renal diet (also called a kidney or CKD diet) adjusts phosphorus, sodium and potassium intake to match what your kidneys can handle. On this site it is defined by three daily limits — 1,000 mg phosphorus, 2,000 mg sodium, 2,000 mg potassium — and each food is rated against them.

What are the main dietary restrictions in CKD?

The main restrictions are phosphorus, sodium and potassium. Sodium matters for fluid and blood pressure, potassium for heart rhythm, and phosphorus for bone and vessel health. Foods are rated higher-risk when any of the three exceeds 30% of its daily limit per 100 g.

What foods should I eat for a healthy CKD diet?

The lower-risk list on this page is a good starting point: 18 foods rated kidney-friendly on all three minerals. In general, unprocessed plant foods — vegetables, fruits, grains, legumes — tend to score well, while processed items with phosphate additives rarely do.

What should a patient with CKD know about diet?

Three things: ratings are data, not prescriptions; your stage and labs change what fits; and your nephrologist or renal dietitian is the one who knows your numbers. This site is not medically reviewed — it presents measured food data, and clinical decisions stay with your care team.

CKD Diet Guidelines: Patient Education, Advice & Recommendations

What the guidelines are based on

CKD diet guidelines are not one fixed menu — they are a set of dietary targets built around three minerals your kidneys handle: phosphorus, sodium and potassium. The guidance used on this site follows KDIGO/KDOQI recommendations for CKD stage 3-4: phosphorus 1,000 mg, sodium 2,000 mg and potassium 2,000 mg per day. Every rating here is a mechanical comparison of a food against those limits, and the full method is public on the methodology page.

Advice for a healthy CKD diet

The day-to-day advice for a healthy diet with CKD is to favour whole foods that stay well under the three daily limits, limit processed items (they are the main source of phosphate additives), and build meals around vegetables, fruits, grains and legumes that score lower-risk on this database. The lower-risk list on this page is the starting point — 18 foods rated friendly on all three minerals.

Dietary restrictions to know

The restrictions that matter most in CKD are the same three minerals, not a long list of forbidden foods. Higher-risk foods are not banned — they are portion-controlled and balanced against the rest of the day. The caution list on this page shows the highest-load items in the database, so you can see exactly which foods push the limits fastest.

Patient education: how to use this site

Patient education on a CKD diet is mostly about reading food data rather than memorising rules. Each food page on this site shows the exact mg of phosphorus, sodium and potassium per 100 g and the percentage of the daily limit. That is the skill to build: check the food, compare it to your day, and let your healthcare team handle your labs, stage and medications.

Lower-risk options (18)

Treat with caution (10)

Higher riskLeavening agents, baking powder, low-sodiumK 10100 · P 6869 · Na 90 mg Higher riskLeavening agents, cream of tartarK 16500 · P 5 · Na 52 mg Higher riskLeavening agents, baking powder, double-acting, straight phosphateK 5 · P 9918 · Na 7893 mg Higher riskParsley, freeze-driedK 6300 · P 548 · Na 391 mg Higher riskBeverages, tea, instant, unsweetened, powderK 6040 · P 239 · Na 72 mg Higher riskBeverages, tea, instant, decaffeinated, unsweetenedK 6040 · P 239 · Na 72 mg Higher riskSpices, chervil, driedK 4740 · P 450 · Na 83 mg Higher riskSpices, coriander leaf, driedK 4466 · P 481 · Na 211 mg Higher riskBeverages, Cocoa mix, low calorie, powder, with added calcium, phosphorus, aspartame, without added sodium or vitamin AK 2702 · P 1630 · Na 653 mg Higher riskSpices, dill weed, driedK 3308 · P 543 · Na 208 mg

Browse all kidney-friendly foods →