for people ages 18 years and up (full criteria)
Healthy Volunteers
healthy people welcome
at San Francisco, California
study started
completion around
Principal Investigator
by Hilary Seligman, MD, MAS
Headshot of Hilary Seligman
Hilary Seligman



The goal of this study is to determine the relationship between produce prescription program 'dose' on benefit redemption, food insecurity, and fruit and vegetable consumption. Participants will be randomized to receive one of three fruit and vegetable benefit dose amounts for 6 months ($40, $80, or $110/month).

Official Title

Comparison of Produce Prescription Benefit Dosage on Redemption


Emerging evidence from the growing body of research around 'Food is Medicine' interventions shows promise that produce prescriptions (PPR) improve health by enabling purchases of healthy foods, reducing food insecurity, and improving diet quality. However, PPR amounts are often set seemingly arbitrarily, without clear connection to their intended purpose. In this study, investigators will conduct a three-armed randomized trial of 240 participants in Stockton, CA to test the impact of three 'doses' of a fruit and vegetable benefit on benefit redemption, food security, and fruit and vegetable intake. The goal of this study is to determine the relationship between PPR program 'dose' and the key intermediate outcomes of benefit redemption (primary outcome), food insecurity, and consumption of incentivized foods (secondary outcomes). Investigators will also seek to identify any 'ceiling effect' above which further increases in benefit value do not lead to further benefit redemption. This will be highly informative for subsequent PPR research. Investigators will leverage the existing infrastructure of the Vouchers 4 Veggies - EatSF produce prescription program to ensure feasibility.


Food Insecurity, Monetary benefit to purchase fruits and vegetables


You can join if…

Open to people ages 18 years and up

  • Individual enrolled in a First Five Program at El Concilio California, located in Stockton, CA
  • Age 18+
  • English or Spanish speaking
  • Literacy sufficient to complete a written survey
  • Technologic capacity to complete an online survey

You CAN'T join if...

  • non English or Spanish speaking
  • cognitive impairment severe enough to interfere with understanding of the survey or consent form, whether due to cognitive delay, substance abuse, dementia, mental illness, or other etiologies
  • Not enrolled in a First Five Program at El Concilio California


  • UCSF
    San Francisco California 94110 United States

Lead Scientist at UCSF

  • Hilary Seligman, MD, MAS
    Hilary Seligman, MD, MAS is Professor at the University of California San Francisco with appointments in the Departments of Medicine and of Epidemiology and Biostatistics. Dr. Seligman is an expert in food insecurity and its health implications across the life course.


accepting new patients by invitation only
Start Date
Completion Date
University of California, San Francisco
Study Type
Expecting 240 study participants
Last Updated