Use of Patiromer to Transition Chronic Kidney Disease Patients With Hyperkalemia to a Plant-rich Diet.

Inclusion Criteria: * Stages 3B-4 CKD (estimated glomerular filtration rate (eGFR) of 15-44 mL/min/1.73m2, not treated with dialysis) * No prior treatment with patiromer * Mild hyperkalemia (potassium 5.1 to \<6.5 mEq/L) on one of the last two blood tests * No prior episodes of moderate-severe hyperkalemia (potassium ≥6.5 mEq/L) in the past 6 months * Deemed appropriate for the intervention by the patient's nephrologist, considering the patient's prognosis, cognition and pending treatments (e.g., dialysis) Exclusion Criteria: * Change in medications that alter potassium homeostasis (e.g., RAAS inhibitors, diuretics, β-blockers) in the last month * Diagnosed with bowel diseases or syndromes (e.g., bowel obstruction, major GI surgery, short-bowel syndrome, irritable bowel syndrome, inflammatory bowel disease, chronic diarrhea) * Dietary restrictions (e.g., allergies) or otherwise unable/unwilling to adhere to study diets (excludes dietary restrictions on high-potassium foods) * Pregnant (females) or planning to become pregnant (males and females) during the study