UC Davis Health Clinical Studies

A Study of the Effects of Sweet Cherry Juice on Metabolism (converting food to energy) and Heart Health

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This research study will test whether regular consumption of cherry juice improves cardiovascular (heart) and metabolic (converting food to energy) health. This study will involve: - daily consumption of study beverages, - tracking study beverage and food consumption in a food diary, - completion of 9 at-home dietary records, - one screening visit and 6 study visits. Here are some reasons you may not want to participate in this research: - You may find frequent test visits at the research center inconvenient and time consuming. - You may find it tedious to: -- drink study beverages, -- limit consumption of certain foods and beverages, -- complete dietary records and questionnaires. - You may find the following procedures uncomfortable: -- blood draws, -- the PAT procedure, -- continuous blood pressure monitoring (CNAP) -- MindWare electrode placement.

Dietary Supplement study
Any, age 20 to 65 years old

A Study of Snacks and Satiety (feeling fed)

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There are still many questions about how we control our appetite and overall food intake. One theory is that fluctuations in blood glucose tell the brain to eat or stop eating. Another theory suggests that certain amino acids in proteins we eat provide ‘stop’ and ‘go’ signals for eating. Many nutrition studies point to high protein or high carbohydrate foods to influence appetite. However, it is not clear if eating snacks, high or low in protein or carbohydrate, can actually affect appetite. We are doing this study to determine if snacks affect appetite and overall food intake. The snacks being used in this study are either almonds (higher in proteins) or a cereal blend (higher in carbohydrates).

Other study
Female, age 18 to 45 years old

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

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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

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

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
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