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Common questions
Straight answers about AI, genes and Alzheimer's
Can an AI tool or a DNA test tell me if I have Alzheimer's?
No. A genetic result estimates lifetime risk, and some AI tools flag patterns worth a closer look, but a diagnosis requires a clinician who examines you and orders tests such as cognitive assessments, blood biomarkers, brain imaging or spinal fluid analysis. Treat any app or website that claims to diagnose Alzheimer's on its own with caution.
What does my 23andMe Alzheimer's result mean?
It tells you how many copies of the APOE ε4 variant you carry, and nothing else. One copy roughly doubles or triples average risk; two copies raise it much more. It is not a diagnosis, roughly half of people with Alzheimer's carry no ε4, and the risk estimates are least accurate outside European ancestry. The 23andMe page explains the detail.
Are blood tests for Alzheimer's real?
Yes. Tests that measure p-tau217 are now used by specialists and predict who will progress to cognitive impairment. They are ordered by clinicians, not sold to consumers, and they measure the disease process directly, which is why they now say more than any genetic result.
Should I take vitamin B12 or an MTHFR supplement?
If a blood test shows low B12 or high homocysteine, treating it is worthwhile and may slow brain atrophy. A genetic MTHFR result on its own does not call for treatment. See the metabolism page.
Is it safe to ask a chatbot for caregiving advice?
For general questions, such as how to respond to repeated questions or make a home safer, chatbots can be a helpful starting point. They can also be confidently wrong. Use them to prepare questions for a professional, and never share another person's private health information with a tool whose privacy policy you have not read.
What should I look for before trusting an AI health tool?
- Has it been tested in peer-reviewed studies with people like you?
- Is it cleared or approved by a regulator such as the FDA, or is it "wellness" only?
- Does it explain its limits and tell you when to see a professional?
- What does it do with your data, and can you delete it?
- Does your clinician recognise it or recommend it?
Does AI replace doctors, nurses, or caregivers?
No. The most useful AI in Alzheimer's care works alongside people: it reads scans so radiologists can focus on hard cases, drafts care plans that nurses refine, and handles reminders so caregivers have more energy for connection.