National Institute On Aging (nia)

This study looks at how the brain changes as kids go through puberty. Healthy children ages 9 to 14 will have MRI scans, blood tests, and body measurements. The goal is to learn more about normal brain development, not to test a treatment.

This study collects blood or saliva samples from people with movement disorders or dementia, along with their family members and healthy volunteers. Researchers will analyze the DNA to find genetic causes of these conditions. The goal is to better understand the diseases, not to …

This study collects tissue samples (like blood, skin, and fat) from healthy volunteers and people with certain conditions. Researchers use these samples to better understand diseases or develop new studies. Participants must be 18 or older and willing to donate samples. The resul…

This study uses yearly PET scans to track amyloid proteins in the brains of 400 adults aged 55 and older over 5 years. The goal is to see how these proteins relate to memory loss and other thinking problems as people age. Participants also complete memory tests and questionnaires…

This study looks at whether stem cells from taste buds can be turned into cells that produce insulin, which could lead to new diabetes treatments. Researchers will take tiny tissue samples from the tongues of 250 healthy adults. The goal is to see if these stem cells can be grown…

This study looks at biomarkers—substances in blood and tissues—to understand how people age. Researchers will follow 900 healthy and frail adults for years, doing tests like blood draws, memory checks, and scans. The goal is to find ways to improve quality of life in old age.

This study looks at whether a natural supplement called urolithin A can help the body release more insulin and control blood sugar in healthy adults aged 55 and older with a BMI of 27 or higher. Participants will take either urolithin A or a placebo daily for 8 weeks and undergo …

This study collects bone marrow samples from healthy adults aged 18 and older to learn how blood-forming cells change as we age. Participants provide a sample every two years. The goal is to understand normal aging, not to treat any disease.

This study aims to improve MRI scanning methods used in aging research. Researchers will test and refine imaging techniques on healthy adults and people with certain health conditions. Participants undergo MRI scans, sometimes with contrast agents or while performing simple tasks…

This study aims to understand how people age by following healthy volunteers for life. Participants aged 20 and older undergo physical and mental tests every few years. The goal is to learn how people can adapt to aging successfully.

This study collects white blood cells from healthy volunteers using a procedure called cytapheresis. The cells are used for lab research only, not to treat any disease. Participants must be at least 18 years old and can donate up to six times per year.

This study aims to measure how quickly proteins in the body are replaced (protein turnover) in healthy adults of different ages. Participants will drink small amounts of safe heavy water for 21 days and undergo tests including muscle and fat biopsies, imaging scans, and strength …