The purpose of the Alzheimer's Prevention Registry GeneMatch program is to identify a large group of people interested in participating in research studies or clinical trials based in part on their genetic background. This genetic information will be used to match interested individuals to studies, providing a recruitment resource to the Alzheimer's scientific community. Interested individuals should visit www.endALZnow.org/GeneMatch to join the GeneMatch program.

The primary objectives of the Alzheimer's Prevention Registry GeneMatch program are to (1) identify and characterize a large cohort of people who are interested in, and may be eligible to participate in, current and future preclinical Alzheimer's disease research studies and clinical trials based on their genetic background, and (2) provide information to these individuals about research studies for which they may be eligible, based in part on their genetic background. Cognitively unimpaired individuals age 50 to 90, inclusive, are eligible to enroll in GeneMatch. GeneMatch will provide participants with a genetic sample kit (a cheek swab) to test for a specific gene called apolipoproteins E (APOE). GeneMatch does not disclose the results of the APOE test to participants. GeneMatch may use the APOE test results to match participants to research studies. Participants are under no obligation to pursue these study opportunities.

Inclusion Criteria:

• Age 50-90, inclusive
• Provide basic demographic, medical history, and contact information
• Consent to APOE genotyping without receiving results
• Live in the United States

Exclusion Criteria:

• Unable to comply with this project's protocol requirements
• Self-reported diagnosis of dementia or any other objective cognitive impairment syndrome

This large research study will ultimately enroll 500,000 adults. We will recruit subjects from all over the United States, as everything is done via email, mail, or/and phone.