185 recruiting studies matching your filters
Background: Artificial sweeteners like sucralose are found in many foods and drinks. Sucralose might affect hormones and cause health changes. Objective: To…
Background: Alcohol use disorder (AUD) is a leading cause of disease and death worldwide. New treatments for AUD are needed. Dopamine, a chemical that carries…
Background: \- Researchers at the National Institutes of Health give many tests of hearing and balance. These tests can help detect problems that affect heari…
The purpose of this study is to use brain imaging technology to measure changes in blood flow to areas in the brain as individuals perform intellectual tasks. …
Background: \- Painful stimuli cause changes in a network of brain regions called the "Pain Matrix." But most of these regions respond to many other stimuli, …
Background: \- Biomarkers are substances in people's blood and tissues. They help researchers understand diseases and signs of aging. Scientists want to do mo…
Background: \- Imaging tests, such as magnetic resonance imaging (MRI), can provide information about heart and blood vessels. The tests let doctors can see t…
Background: Abnormal fats in the blood can lead to many problems, including heart disease. Researchers want to learn more about how eating meals with differen…
Background: Opioid drugs are often prescribed for acute and chronic pain. But these drugs are addictive, and they lead to more than 14,000 overdose deaths in …
Background: Many people in the United States are overweight or obese. This natural history study will look into how life events during childhood can impact ea…
Background: Vision is vital for many of our daily activities. Researchers want to learn more about how we aim our eyes (that is, what images, such as faces, i…
Background: Many people in the United States are overweight or obese. Researchers want to learn why some people can overeat and not gain weight, whereas other…