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Vitamins in dialysis: who, when and how much?
George Kosmadakis1, Enrique Da Costa Correia, Odette Carceles
1Pole Metabolique and Renal Unit, Centre Hospitalier Vichy , Vichy , France.
Renal Failure
|February 8, 2014
Summary
Dialysis patients often experience vitamin imbalances due to diet, nutrient loss, and absorption issues, impacting cardiovascular health. Understanding these vitamin disturbances is key for effective patient management and improved outcomes.
Area of Science:
- Nephrology
- Nutritional Science
- Cardiovascular Medicine
Background:
- Cardiovascular disease remains a leading cause of mortality in dialysis patients, despite advancements in blood purification.
- Vitamins are essential for metabolic pathways, but dialysis patients frequently exhibit vitamin deficiencies or excesses (hypo- or hypervitaminosis).
- Multiple factors contribute to these vitamin derangements, including restrictive diets, nutrient loss during dialysis, malabsorption, and medication side effects.
Purpose of the Study:
- To review the complex issues surrounding vitamin therapy in patients undergoing dialysis.
- To address the contradictory opinions and practices regarding vitamin supplementation and management in this population.
Main Methods:
- Literature review of factors affecting vitamin status in dialysis patients.
- Analysis of the impact of renal replacement therapy on vitamin metabolism and excretion.
- Examination of the role of antioxidants and other vitamins in cardiovascular health for dialysis patients.
Main Results:
- Dialysis patients face unique challenges including non-physiological diets, intradialytic nutrient loss, gastrointestinal malabsorption, and antibiotic-induced microflora changes.
- Certain medications can impair vitamin absorption, while kidney dysfunction affects vitamin metabolism and excretion, leading to potential toxicity.
- Antioxidant vitamins, crucial for cardioprotection, may be depleted, exacerbating cardiovascular risks.
Conclusions:
- Vitamin therapy in dialysis patients is complex, with significant risks of both deficiency and toxicity.
- Careful consideration of individual patient factors, vitamin metabolism, and potential interactions is essential for safe and effective vitamin management.
- Further research is needed to clarify optimal vitamin supplementation strategies to mitigate cardiovascular morbidity and mortality in dialysis patients.
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