A Pilot Randomized Crossover Trial Assessing the Safety and Short-Term Effects of Walnut Consumption by Patients with Chronic Kidney Disease.

Abstract

The aim of this study of patients with chronic kidney disease (CKD) is to assess the safety of daily consumption of walnuts on the physiological levels of phosphorous, potassium, parathyroid hormone (PTH), and fibroblast growth factor 23 (FGF23), and to assess the short-term benefits of this intervention on risk factors associated with cardiovascular events. This led us to perform a prospective, randomized, crossover, pilot clinical trial examined 13 patients with CKD. Subjects were randomly assigned to a diet of 30 g of walnuts per day or the control diet. After 30 days, each group was given a 30-day washout period, and then switched to the alternate diet for 30 days. Urinary and serum levels of phosphorous and potassium, multiple vascular risk factors, and urinary inositol phosphates (InsPs) were measured at baseline and at the end of the intervention period. Our results showed that the walnut dietary supplement led to reduced blood pressure, LDL cholesterol, and albumin excretion, but had no effect on the physiological levels of phosphorous, potassium, PTH, and FGF23. This is the first report to show that daily consumption of walnuts by patients with CKD does not alter their physiological levels of phosphorous, potassium, PTH, and FGF23 when included in a sodium-, protein-, phosphate-, and potassium-controlled diet, and it could be an effective strategy for reducing cardiovascular risk in patients with CKD.

• Authors: Pilar Sanchis, Marilisa Molina, Francisco Berga, Elena Muñoz, Regina Fortuny, Antonia Costa-Bauzá, Felix Grases, Juan Manuel Buades
• Journal: Nutrients (Nutrients) Vol. 12 Issue 1 (Dec 25 2019) ISSN: 2072-6643 [Electronic] Switzerland
• PMID: 31881702 (Publication Type: Journal Article, Randomized Controlled Trial)

Chemical References

• FGF23 protein, human
• Inositol Phosphates
• Parathyroid Hormone
• Phosphorus
• Fibroblast Growth Factors
• Fibroblast Growth Factor-23
• Potassium

Topics

• Aged
• Blood Pressure (physiology)
• Cardiovascular Diseases (prevention & control)
• Cross-Over Studies
• Diet (adverse effects, methods)
• Female
• Fibroblast Growth Factor-23
• Fibroblast Growth Factors (blood)
• Humans
• Inositol Phosphates (urine)
• Juglans
• Male
• Nuts
• Parathyroid Hormone (blood)
• Phosphorus (blood, urine)
• Pilot Projects
• Potassium (blood, urine)
• Prospective Studies
• Renal Insufficiency, Chronic (diet therapy, physiopathology)
• Risk Factors