for people ages 18-65 (full criteria)
Healthy Volunteers
healthy people welcome
at UC Davis
study started
estimated completion
Principal Investigator
by Elizabeth Chin (ucdavis)



The SnapMe Study is a single-group, prospective study that requires healthy adults to maintain food diaries in order to develop benchmark data for the prediction of food characteristics.


The purpose of this study is to develop a method that uses photography to accurately calculate the types and amounts of nutrients in meals that are consumed by healthy participants, thereby replacing the use of electronic food records. Researchers expect about 100 healthy individuals at UC Davis and around the U.S. will join to participate in this research. Participation in this study will involve taking pictures of every meal and snack the individual consumes using a smartphone for 3 days (2 weekdays, 1 weekend day) and uploading the images to a mobile phone application called Bitesnap. In addition, the participant will be asked to complete online food records on the same days using the Automated Self-Administered 24-hour Dietary Assessment Tool (ASA24-2020). Each participant will have 4 weeks to complete the study.


Food Characteristics Artificial intelligence Dietary records Food systems Computer science Sustainability Nutrition


You can join if…

Open to people ages 18-65

  1. Healthy adults
  2. Has a social security number or Tax ID
  3. Age 18-65 years of age
  4. Lives anywhere in the United States of America
  5. Has been weight-stable (has not lost or gained 10% of body weight) within the past 3 months
  6. Currently owns a smart phone (Android or iPhone)
  7. Has owned and used a smart phone for at least 12 months
  8. Consumes at least 3 meals per day
  9. Consumes at least 50% of meals that are prepared at/from home vs. outside the home (dine-in restaurants, take-out, etc.)
  10. . Prepares at least 50% of the prepared meals within their household
  11. . Willingness to refrain from participating in any experimental trials during this study period
  12. . Willingness to refrain from having any non-emergency, elective surgeries during the study period
  13. . Willingness to eat different/variety of foods for each meal over the three days of dietary record collection
  14. . Willingness to refrain from consuming meal substitution items (examples: Slimfast shake, Soylent, meal replacement bars) over the three days of dietary record collection
  15. . Willingness to download and use an app linked to their smart phone's camera and photo storage
  16. . Willingness to spend 1-2 hours per day on each of the three study days to: 1)enter detailed information about each meal they consume using an online record system and an app on their smart phone and 2) take and upload photos of their meals on their smart phone
  17. . Willingness to refrain from sharing meals with other participants during data collection
  18. . Passes a food matching test on the online screening survey with score >70%.

You CAN'T join if...

  1. Currently pregnant or plans to become pregnant several weeks prior to enrollment and during the study period
  2. History of any type of eating disorder (anorexia nervosa, bulimia, etc.)
  3. Use of restrictive diets such as caloric restriction or intermittent fasting of more than 12 hours that has resulted in weight loss greater than 10% of their body weight within the past 3months ordiets
  4. Anyone the investigator feels is not an applicable participant.


  • University of California, Davis accepting new patients
    Davis California 95616 United States

Lead Scientist at University of California Health


accepting new patients
Start Date
Completion Date
University of California, Davis
Study Type
Last Updated