Alzheimer's Disease Prevention Study

  • End date
    Jun 1, 2023
Updated on 23 September 2022
Online studies
Accepts healthy volunteers


The purpose of this study conducted at Stanford University is to investigate if the dietary fiber correlates with cognitive function and other biomarkers. Active participation will take approximately 3-5 hours total over the course of 1 year. 

We will ask you to do the following tests for 3 times (every 6 month): 
1. Complete a 2 weeks food log as well as a food frequency questionnaire; 
2. Complete a battery of online cognitive tests; 
3. Collect a small blood sample (called microsampling collection) as well as stool samples; we will mail the kits to your place to let do at-home sample collection; 
4. Optional: we also want to collect fitness tracker data, if you own a device already, such as Fitbit or Apple watch.


There are 3 data collection time points: at beginning, 6 months, and 1 year. 
These include: • Online cognitive tests (duration of about 12 minutes). 
• Filling diet records for 2 weeks and 1 diet questionnaire. 
• Self-collected blood microsamples and stool samples. All the testing will be done from your home with no need of physical visits.

Condition Dementia, Healthy Volunteers
Clinical Study IdentifierTX284521
Last Modified on23 September 2022


Yes No Not Sure

Inclusion Criteria

Age 18 or older
Live in the USA
Own a touchscreen device bigger than a phone, such as a tablet, iPad, or touchscreen laptop

Exclusion Criteria

Have any medical condition that physicians believe would interfere with study participation or evaluation of results
Have any mental incapacity and/or cognitive impairment that would preclude an adequate understanding of, or cooperation with, the study protocol
You are pregnant
Clear my responses

How to participate?

Step 1 Connect with a study center
What happens next?
  • You can expect the study team to contact you via email or phone in the next few days.
  • Sign up as volunteer  to help accelerate the development of new treatments and to get notified about similar trials.

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Additional screening procedures may be conducted by the study team before you can be confirmed eligible to participate.

Learn more

If you are confirmed eligible after full screening, you will be required to understand and sign the informed consent if you decide to enroll in the study. Once enrolled you may be asked to make scheduled visits over a period of time.

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Complete your scheduled study participation activities and then you are done. You may receive summary of study results if provided by the sponsor.

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