UC Davis Health Clinical Studies

A Study of Olive Oil Polyphenols (nutrients in plant-based food) and Cardiovascular Health

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

You are invited to participate in a research study. The purpose of this research is to investigate whether consuming two different kinds of olive oil will change risk factors related to cardiovascular disease. This includes levels of good and bad cholesterol, levels of inflammation, and levels of gene expression. You are invited to be in this study because you are a healthy individual aged 20-45 with a BMI over 20 kg/m2. Your participation in this research will involve 5 visits (including today’s initial screening) and will last about 8 weeks. There is a 2-week run-in period before starting the study. Then, two diet intervention periods each lasting two weeks, separated by a two-week washout period.

Dietary Supplement study
Any, age 20 to 45 years old

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

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

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)

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

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

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
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