Clinician Guides 9 min read·Updated 1 June 2026 Clinician-reviewed
A Nephrologist's Guide to Vitamins in CKD
Written from a UK Consultant Nephrologist's perspective: which vitamins are typically used in chronic kidney disease, which are avoided, and how to read a multivitamin label with kidney health in mind.
Medically reviewed by Professor Mohammed Mahdi Althaf — Consultant Nephrologist & Acute Physician (GMC 7216325) · Last reviewed May 2026
TL;DR
The short version — skip ahead with the key points.
In CKD, kidney-aware vitamin use means moderate B-complex, individualised vitamin D and limited vitamin C, while avoiding high-dose vitamin A and added potassium, phosphate or magnesium. Diet, prescribed therapy and your renal team come first; a kidney-conscious daily supplement like Kidney Vitality is a supportive layer, not a treatment.
Key takeaways
Diet and your renal team come first.
🌾Water-soluble B-complex is widely supported, especially on dialysis.
☀️Vitamin D is individualised — sometimes prescribed.
High-dose vitamin A and added potassium / phosphate / magnesium are avoided.
Read every supplement label — kidney-aware brands name what they don't add.
Related reading: Vitamins Safe in CKD.
How to read a multivitamin label with CKD in mind
Check four things: (1) Is vitamin A present as retinol, and at what dose? Anything > 800 µg as retinol is usually avoided. (2) Is potassium, phosphate or magnesium added? If yes, it is generally not kidney-aware. (3) How much vitamin C? Aim for ≤ 100 mg/day. (4) Is the B-complex sensible (standard daily doses, not megadose)?
Where prescribed renal multis fit
If your renal team has prescribed Renavit, Dialyvit or a similar product, continue with that. It is tuned to dialysis-related losses. Kidney Vitality is for adults who are not on a prescribed renal multivitamin and want a kidney-conscious daily option.
Why Kidney Vitality fits this need
Aligned with UK renal guidance
Designed around NICE NG203, KDOQI 2020 and BDA renal resources.
Clinician-formulated
Designed by Professor Mohammed Mahdi Althaf (GMC 7216325).
Kidney-conscious by design
No megadose vitamin A, no added potassium, phosphate or magnesium.
Frequently asked questions
What is a 'kidney-aware' approach to vitamins?
A kidney-aware approach prioritises water-soluble B-complex vitamins, moderate vitamin C and individualised vitamin D, while avoiding high-dose vitamin A and added potassium, phosphate or magnesium. It aligns with NICE NG203, KDOQI 2020 Nutrition in CKD and British Dietetic Association renal resources.
Why are these principles different from a general multivitamin?
General multivitamins are designed for adults with normal kidney function. CKD changes how the body clears many nutrients, so the same dose that is harmless in a healthy adult can accumulate in someone with reduced kidney function.
Does diet matter more than supplements?
Yes. A renal-aware diet, supported by a renal dietitian where available, is the foundation. Vitamins are a supportive layer — useful when intake is low, on dialysis, or when specific deficiencies are identified by your renal team.
How does Kidney Vitality fit?
Kidney Vitality is a kidney-conscious daily food supplement designed for adults who want sensible nutritional support that respects renal nutrition principles — not a prescribed renal multivitamin and not a treatment for kidney disease.
This page is general information, not personal medical advice. If you have chronic kidney disease, are on dialysis, have had a kidney transplant, or take prescription medication, please confirm any supplement with your GP, pharmacist or renal team before starting.
