Current Studies

An online form is available to contact the coordinators of each study listed below.

Plant Polyphenol Study

We are looking for interested participants to volunteer to participate in a 4 week research study that will investigate the beneficial effects of supplementation with a plant polyphenol blend rich in anthocyanins on parameters of inflammation and metabolic responses following a challenge with a Western style diet meal.

To qualify for this study you must be:

  • Healthy men and women
  • 18-35 years of age
  • Weighing more than 110 pounds (and a BMI between 21 to 29.9 kg/m2)
  • Be willing to come in for one study visit lasting 1 hour and two study visits lasting about 6 hours each
  • Be willing to eat high-fat meal and provide blood samples
  • Having no known allergies to bilberries, black currants, or rice
  • Be willing to stop all supplement use prior to and throughout the study period

Participants will receive:

  • Participants will receive $200 for completion of all study visits

Study Location:

  • Ragle Human Nutrition Research Center, Academic Surge, UC Davis


For more information: call (530) 752-9262 or use the online form to contact a study coordinator.


Protein for Kids Study

Parents! We Are Looking For Children Who Are Willing to Participate in a Nutrition Research Study

We want to learn how a new nutritious food product will affect metabolism and cardiovascular health in children.

This vegetarian food product provides protein from pea, and is fortified with vitamins and minerals. We are encouraging that children replace their typical snack with this food.

To see if your child qualifies for the study, your child must be willing to:

  • Eat about half a cup of this food product every day for 4 weeks.
  • Provide 2 blood and urine samples that are 4 weeks apart
  • Have us measure blood flow in their fingertip using a special finger probe


We are also seeking children who in addition to the above are willing to provide 2 stool and saliva samples (this is optional and not required for study participation).

We will also provide your child with nutrition education, and will ask them to wear a personal physical activity monitor every day during waking hours.

Parents or guardians must be willing to bring their children to UC Davis campus in Davis for 3 study visits each lasting about 2-3 hours.

You and your child together will receive up to $250 for all required procedures and up to $390 if you and your child elect to participate in the stool and saliva collections.

If your child is 9- 13 years old, please call the Keen Lab at (530) 752-2915 to see if your child qualifies. We will ask you questions about your child’s overall health.  Our you can use the online form to contact a study coordinator.

Strawberry Study - Men and Postmenopausal Women needed for a Research Study

We are looking for interested participants to volunteer to participate in a 14 week research study that will examine the effects of daily strawberry powder intake on markers of gut and cardiovascular health.

To qualify for this study you must be:
  • 40-65 years of age
  • Overweight or Obese
  • Be willing to come in for 7 study visits, lasting about 2 hours each
  • Be willing to provide blood, urine and stool samples
  • Not taking any medications, and are willing to stop all supplement use prior to and throughout the study period.

Participants will receive:

  • Participants will receive $545 for completion of all study visits

Study Location:

  • Ragle Human Nutrition Research Center, Academic Surge, UC Davis


For more information: call (530) 752-2915 or use the online form to contact a study coordinator.



Metabolic Effects of Sugar/Aspartame Study (MESA Study)

People are consuming a lot of sugar

Scientists at the University of California, Davis are conducting a research study to determine the effects that drinking sweetened beverages with provided study meals each day has on a person's metabolism.

We need healthy men and women, ages 18-40, who:

  • Are willing to consume the breakfast, lunch, and dinner provided by the study staff each day for approximately 42 days.
  • Are willing to drink 3 sweetened beverages per day for approximately 56 days along with the provided study meals.
  • Are non-smokers and not taking thyroid, lipid-lowering, diabetes, depression or blood pressure medications.
  • Are willing to spend two sessions (6 hours each) at the Ragle Research Facility at the UC Davis days or 30 hours each) at the Touro University Translational Clinic campus, and two sessions (1 1/4 days in Vallejo, CA (transportation provided by staff)
  • Have extra time to devote to helping us answer this important question.

Participation in this study requires a significant time commitment:

  • The entire study lasts approximately 70 days.
  • You will need to spend time at our research facilities:
    • Ragle Research Facility at the UC Davis campus located in Davis, CA.
      • For 6 hours at the beginning of the study
      • For 6 hours at the middle of the study
    • Touro University Translational Clinic (TUTC) in Vallejo, CA (transport provided by staff).
      • For 1 1/4 days (30 hours) during the 2nd week of the study
      • For 1 1/4 days (30 hours) during the 6th week of the study
  • You will be compensated approximately $1,170 for completing the study. There will be no compensation for participation in screening or consenting procedures.

Forms