Effect of a DASH-Style Diet on Urinary Risk Factors for Kidney Stone Disease

The University of Alabama at Birmingham logo

The University of Alabama at Birmingham


Begins enrollment this month


Kidney Stone


Other: Western-Style Diet
Other: DASH-Style Diet

Study type


Funder types




Details and patient eligibility


The true capacity for a healthy diet to improve urinary stone risk factors is not well-defined. The objective of this study is to measure the effect of adopting a healthy dietary pattern on kidney stone disease (KSD) risk. The working hypothesis is that a Dietary Approaches to Stop Hypertension (DASH)-style diet will improve 24-hour urine stone risk parameters. The approach to testing this hypothesis will be to randomize participants with KSD to a standardized DASH-style vs. Western-style diet for one week. The Bionutrition Unit of the Center for Clinical and Translational Science will provide all meals to participants. The rationale for this study is that by measuring the effect of a DASH-style diet on urinary stone risk parameters, a benchmark for future real-world, implementation studies will be established. Based on available evidence, this will be the first controlled diet study to assess the DASH dietary pattern for improving urinary stone risk parameters.


45 estimated patients




19+ years old


No Healthy Volunteers

Inclusion criteria

  • Birmingham, Alabama area participants of the Coronary Artery Risk Development in Young Adults (CARDIA) study or patients of the University of Alabama at Birmingham
  • Self-reported history of kidney stone disease
  • Able to provide informed consent
  • Willing to consume meals prepared by Bionutrition Unit
  • No food allergies/intolerance to any of the foods in the study menus
  • Willing to stop dietary supplements including calcium and vitamin C for 14 days before and during study

Exclusion criteria

  • Dialysis
  • Kidney transplant recipient
  • Estimated glomerular filtration rate (eGFR) <60 ml/min/1.73m2 based on historical laboratory measurements
  • Renal tubular acidosis
  • Current use of acetazolamide, topiramate, or zonisamide
  • Primary hyperparathyroidism
  • Hyperthyroidism
  • Sarcoidosis
  • Primary hyperoxaluria
  • Cystinuria
  • Nephrotic syndrome
  • Malabsorptive conditions including inflammatory bowel disease and history of gastric bypass
  • Urinary retention requiring catheterization
  • Urinary diversion
  • Pregnancy
  • Breastfeeding
  • Malignancy treated in the past 12 months other than non-melanoma skin cancer

Trial design

Primary purpose




Interventional model

Parallel Assignment


Triple Blind

45 participants in 2 patient groups

DASH-Style Diet
Experimental group
For seven days, participants will consume a diet characterized by higher intake of fruits, vegetables, and low-fat dairy, in addition to whole grains, poultry, fish, and nuts, but smaller amounts of red meat, sweets, and sugar-containing beverages.
Other: DASH-Style Diet
Western-Style Diet
Other group
For seven days, participants will consume a diet characterized by characterized by higher intake of red meat, sweets, and items containing added sugar, processed starches, and seed oils, in addition to lower intake of fruits, vegetables, and low-fat dairy.
Other: Western-Style Diet

Trial contacts and locations



Central trial contact

Joseph Crivelli, MD

Data sourced from clinicaltrials.gov

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