
Can a blood test detect dementia? What Alzheimer’s tests can and cannot show
Understand Alzheimer's biomarker blood tests, routine blood work, FDA-cleared test use, false results, and questions to ask your clinician.
· 9 min readUnderstanding memory changes
Where to begin
Notice the pattern, put memory lapses in context, and understand the assessment options.

Understand Alzheimer's biomarker blood tests, routine blood work, FDA-cleared test use, false results, and questions to ask your clinician.
· 9 min read
Learn what young-onset dementia means, its possible symptoms and causes, the role of family history, and how assessment works.
· 9 min read
Understand early dementia symptoms, everyday examples, other possible causes, and when to seek a medical assessment.
· 8 min read
Compare manageable memory lapses with persistent cognitive changes, understand mild cognitive impairment, and prepare for assessment.
· 8 min read
Explore the evidence linking sleep and dementia, understand relative risk, recognize sleep apnea symptoms, and learn practical next steps.
· 9 min readUnderstand the topic
Memory changes can raise difficult questions for the person experiencing them and the people close to them. Dementia describes changes in thinking that affect everyday functioning, and different diseases can cause it. This collection begins with practical examples of early changes, then puts everyday forgetfulness and symptoms before age 65 in context. It also explains what sleep studies and Alzheimer’s blood tests can tell us, where uncertainty remains, and which questions to bring to a clinician. Each guide connects observations with a useful next step while respecting the person’s independence and choices.