UC Davis Health Clinical Studies

Fiber Study

The purpose of this study is to determine if dietary fiber increases overall gut health

The purpose of this study is to investigate whether consuming a packet of fiber powder per day changes the composition and/or function of the gut microbiota and high density lipoproteins (HDL) or good cholesterol. If you take part in this research, you will be responsible to keep your normal diet with low fiber content, defined as less than approximately 15g/day, or equivalent to approximately 4 servings of fruit, vegetable, legume, or whole grain combined per day. You also need to attend all the visits until the endpoint of the study and provide all the questionnaires and biological samples as instructed under your consent.

Dietary Intervention Clinical Trial
Any, age 18-45

An Evaluation of the Health Education Theater Course

Volunteer for research at UC Davis and contribute to discoveries that may improve health care for you, your family, and your community!

The purpose of this study is to see if the enrollment in a course (entitled “Health Education Theater”) causes any changes in five major outcomes. These five outcomes include: (1) the knowledge about guidelines about (a) physical activity and (b) diet/nutrition. (2) compliance to these guidelines. The third outcome is (3) the economic efficiency (e.g., return on investment (ROI)) estimated by a cost-benefit analysis (CBA)). This will account for productivity loss (e.g., income loss) saved in the long-term (e.g., life time). The fourth outcome is (4) health related quality of life. The fifth outcome is (5) self-perception well-being measures such as self-esteem and and selfefficacy.

Behavioral study
Any, age 18 years or older

Koa Family: California's Obesity Prevention Project

This study hopes to learn if a new whole health program improves the health of low-income mothers.

The purpose of this study is to learn if a new whole health program improves the health of low-income mothers. To be eligible for this study, you must be a woman between the ages of 18 and 47. You must be comfortable speaking and reading English and be a mother (or caregiver) whose youngest child is between the ages of 3 and 17. You also must live in a low-income household (at or below 185% of the Federal Poverty Level), live in the Mack Road neighborhood of Sacramento or the City of Woodland, and have a cell phone that can receive text messages.

Behavioral study
Female, age 18 to 47 years old

A Study of the Effects of Intermittent Fasting on Energy, Hormones, Body Composition, and Performance in Male Runners

The study team hopes to learn more about how time restricted eating affects performance and health in male runners.

This study is designed to test the effects of four weeks of time restricted feeding (16 hours fasting and 8 hours feeding). These effects will be compared to four weeks of a more traditional eating pattern (12 hours fasting and 12 hours feeding). The study team will look at the following in male competitive runners: • Resting energy expenditure • Blood markers of metabolism and hunger • Body composition • Cardiovascular health • Substrate utilization (carbohydrate and fat burning) • Fitness

Behavioral study
Male, age 20 to 40 years old

Women needed to help us understand what happens when a birth control pill is taken late or a whole day is skipped

You may be eligible to help researchers learn more about the most effective way to use estrogen-free birth control pills!

The purpose of this clinical research study is to understand the effect of a delayed or missed birth control pill. We know that birth control pills are most effective when taken at the same time every day. This study will help us understand more about what happens to the cervical mucus and the ovaries when a progestin-only pill (POP) is taken late or a whole day is skipped. The pill used in this study is Norgestrel, a progestin-only pill (POP). This POP has been marketed in the United States in the past but is not currently approved for use so it is considered experimental. If you're currently not taking a hormonal contraceptive, are unable to become pregnant, or willing to refrain from sexual activity during the course of the study you may be eligible. This clinical research study is conducted at the UC Davis Department of Obstetrics and Gynecology. You will receive all study medication and study evaluations at no cost, and compensation for your time is available.

Drug study, Phase 2
Female, age 18 to 35 years old

The Effects of Sucrose-sweetened Beverage in African-American and Caucasian Women (SAAC) Study

In this study, we hope to learn about the metabolism of koolaid beverages that contain added sucrose (table sugar).

The main goal of this research study is to learn about the metabolism of koolaid beverages that contain added sucrose (table sugar). We hope that what we learn will help patients in the future. As with all research studies, no one can guarantee that participating in a research study will help you. We invite you to take part in a research study if you: - identify as either an African-American or non-hispanic White woman. - are a woman between the ages of 18-45 years. - are a nonsmoker who does not have diabetes mellitus or liver, kidney or thyroid disorders. - do not take hypolipidemic, anti-diabetic, anti-hypertensive or anti-depression medication. - have a stable body weight during the prior 6 months

Biological Study
Female, age 18-45