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Multivitamin Supplementation CKD Evidence — ESENeph MCQ

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EasyChronic Kidney DiseaseMultivitamin Supplementation CKD EvidenceESENeph

A 55-year-old man with CKD G3b asks whether he should take a daily multivitamin supplement. He eats a balanced diet. What is the evidence regarding routine multivitamin supplementation in CKD?

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Correct answer: C — Routine multivitamin supplementation is NOT recommended for CKD patients on a balanced diet; however water-soluble vitamin depletion occurs in dialysis patients (dialysis removes B vitamins, folate, vitamin C) – renal-specific multivitamins are recommended for dialysis patients; high-dose vitamin C should be avoided (>200 mg/day increases oxalate)

For non-dialysis CKD with a balanced diet, routine multivitamin supplementation has no proven benefit and potential harms: high-dose vitamin A accumulates in CKD (toxicity); high-dose vitamin C increases oxalate (nephrolithiasis risk); vitamin E megadoses may increase mortality. For DIALYSIS patients, water-soluble vitamin losses during dialysis (B1, B6, B12, folate, vitamin C) warrant supplementation with renal-specific formulations (e.g. Renavit) that provide appropriate amounts without excess. KDOQI 2020 nutrition guidelines address vitamin needs specifically for CKD stages.

Reference: KDOQI 2020 – Nutrition in CKD; KDIGO 2024 – CKD