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Corn is moderate in potassium (~270 mg/100g). Early CKD: fine in half-cob portions. Stage 4-5 and dialysis: limit portions and skip the salted 'masala' street version.
Sweet corn carries a moderate potassium load (~270 mg/100g) with low phosphorus — a middle-of-the-road vegetable for renal diets.
The street version (bhutta with salt and masala) adds sodium — the kidney-unfriendly part is the seasoning, not the corn.
Bottom line: half a cob, no added salt, counted in the budget — fine for most stages.
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This content is a general reference, not medical advice, a diagnosis, or a treatment plan. Do not change your diet, fluids, medicines, or dialysis plan without your nephrologist or renal dietitian. Individual recommendations depend on your labs, medications, conditions, and care plan.