Thank you for your post. There are not many studies available on the nutrient loss on hemodialysis depending on time of treatment. There are a few studies looking at this subject in patients on peritoneal dialysis, however the dialysis modality is too different to compare with hemodialysis. I will ask the nephrologists that I work with if they have seen any other studies and I will get back to you on this if I learn anything. If you are taking a renal vitamin you should not be concerned with toxicity if taking it daily. These vitamins are made specifically for individuals with kidney disease. Finally, could you please clarify your question about omega- 3, 6, and 9 supplements with regards to phosphorus and potassium. Are you interested to know if these supplements may increase your blood levels of phosphorus and potassium?
LeeAnn Smith Weintraub, MPH, RD