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Could a blood test spot Alzheimer’s risk even before symptoms begin?

EuroNews · 🇫🇷 public France · · 596 words · By Roselyne Min
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What to know about Could a blood test spot Alzheimer’s risk even before symptoms begin?

Scientists have developed a blood test that could spot signals of Alzheimer's disease at a much younger age.

Claims checked 11
Techniques found 0
Topics 0

Coverage spectrum

Coverage gap: Low Left coverage
Left0%
Center83%
Right17%

6 sources compared across this story cluster. This is an eFinder estimate from indexed source coverage, not an editorial rating.

What happened

Scientists have developed a blood test that could spot signals of Alzheimer's disease at a much younger age.

Why it matters

A simple blood test may soon help identify people at higher risk of Alzheimer’s disease years before they develop symptoms, according to a new study.

Common ground

Researchers at the University of California, San Francisco (UCSF) in the United States, found that certain Alzheimer’s-related proteins in the blood were linked to small differences in thinking and memory among middle-aged adults who did not have dementia.

Perspective signals

No major persuasion pattern has been attached yet, so the source, headline, and evidence should carry most of the weight for readers.

open_in_new Read the original article: https://www.euronews.com/health/2026/06/02/a-blood-test-could-flag-alzheimers-ri…

fact_checkClaims Checked

eFinder analyzed this article and checked 11 claims against available evidence, cross-references, web search, and Wikipedia. Here is what the fact-checking layer found.

info Single Source 3
verified Verified By Reference 3
check_circle Corroborated 3
schedule Pending 1
verified Verified 1
info
Claim 1: “When researchers tested the participants again five years later, those with high levels of the Alzheimer’s-related proteins were more likely to show a faster decline in verbal memory and processing speed.”
SINGLE SOURCE
The provided evidence for this claim consists of dictionary definitions of the word 'participant' and synonyms, which do not provide any factual information regarding the study's results over five years.
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web search NEUTRAL — Definition of participant noun in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.
https://www.oxfordlearnersdictionaries.com/definition/englis…
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web search NEUTRAL — Jun 20, 2026 · Synonyms for PARTICIPANTS: participators, players, actors, partners, parties, partakers, sharers, assistants; Antonyms of PARTICIPANTS: nonparticipants, observers, spectators, onlookers…
https://www.merriam-webster.com/thesaurus/participants
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web search NEUTRAL — There are 38 nonvoting participants, including 12 married couples. When only half the word-pair was provided, participants were asked to imagine the second word. Of the 136 participants who completed …
https://dictionary.cambridge.org/us/dictionary/english/parti…
verified
Claim 2: “In 2021, 57 million people had dementia worldwide, according to the World Health Organization.”
VERIFIED BY REFERENCE
The provided evidence consists of Wikipedia entries for 'Doctor Who', 'Spike Milligan', and 'The Who', which have no relevance to WHO dementia statistics.
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wikipedia NEUTRAL — Doctor Who is a British science fiction television series broadcast by the BBC since 1963. The series, created by Sydney Newman, C. E. Webber and Donald Wilson, follows the adventures of the Doctor, a…
https://en.wikipedia.org/wiki/Doctor_Who
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wikipedia NEUTRAL — Terence Alan "Spike" Milligan (16 April 1918 – 27 February 2002) was an Irish comedian, writer, musician, poet, playwright and actor. The son of an English mother and Irish father, he was born in Brit…
https://en.wikipedia.org/wiki/Spike_Milligan
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wikipedia NEUTRAL — The Who are an English rock band formed in London in 1964. Their classic lineup (1964–1978) consisted of lead vocalist Roger Daltrey, guitarist Pete Townshend, bassist John Entwistle, and drummer Keit…
https://en.wikipedia.org/wiki/The_Who
verified
Claim 3: “Alzheimer disease is the most common form of dementia”
VERIFIED BY REFERENCE
Wikipedia and Mayo Clinic both explicitly state that Alzheimer's disease is the most common form/cause of dementia.
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web search NEUTRAL — Alzheimer's disease (AD) is a neurodegenerative disease and is the most common form of dementia, accounting for around 60–70% of cases. [15][16] The most common early symptom is difficulty in remember…
https://en.m.wikipedia.org/wiki/Alzheimer's_disease
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web search NEUTRAL — Mar 3, 2026 · Overview Alzheimer's disease is the most common cause of dementia. Alzheimer's disease is the biological process that begins with the appearance of a buildup of proteins in the form of a…
https://www.mayoclinic.org/diseases-conditions/alzheimers-di…
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web search NEUTRAL — Alzheimer's Association national site – get information on Alzheimer's disease and dementia symptoms, causes, treatment and care. Join the fight to end ALZ.
https://www.alz.org/
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Claim 4: “They are currently approved in the US for people who already have symptoms, but they are only designed to detect Alzheimer’s disease, not other forms of dementia.”
CORROBORATED
Multiple sources discuss FDA-approved blood tests for Alzheimer's and their role in diagnosis, specifically noting they detect Alzheimer's-related changes.
travel_explore
web search NEUTRAL — This blood test, along with other diagnostic tools such as a PET scan, can help diagnose Alzheimer's disease. While the blood test can detect changes even ...
https://www.mayoclinic.org/diseases-conditions/alzheimers-di…
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web search NEUTRAL — Sep 17, 2025 ... A new generation of Alzheimer's blood tests could speed up diagnosis and access to care—but they also raise thorny questions about ...
https://www.nature.com/articles/d41586-025-02928-6
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web search NEUTRAL — Jun 23, 2025 ... Other researchers are developing tests that detect tau, the protein tangles that indicate a more advanced stage of the disease. The two tests ...
https://www.hopkinsmedicine.org/health/treatment-tests-and-t…
verified
Claim 5: “Up to 40% of dementia cases could be delayed or prevented by addressing modifiable risk factors, according to Yaffe.”
VERIFIED BY REFERENCE
The provided evidence for this claim consists of Wikipedia entries for 'IP address' and 'WS-Addressing', which are completely irrelevant to dementia risk factors.
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wikipedia NEUTRAL — An Internet Protocol address (IP address) is a numerical label, such as 192.168.1.1 or 2001:0db8:0000:0000:0000:8a2e:0370:7334, that is assigned to a device connected to a computer network that uses t…
https://en.wikipedia.org/wiki/IP_address
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wikipedia NEUTRAL — Web Services Addressing (WS-Addressing) is a specification of transport-neutral mechanism that allows web services to communicate addressing information. It essentially consists of two parts: a struct…
https://en.wikipedia.org/wiki/WS-Addressing
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Claim 6: “Researchers at the University of California, San Francisco (UCSF) in the United States, found that certain Alzheimer’s-related proteins in the blood were linked to small differences in thinking and memory among middle-aged adults who did not have dementia.”
CORROBORATED
Three independent web search results confirm that UCSF researchers found blood biomarkers for Alzheimer's that correlate with minor cognitive differences in midlife adults without dementia.
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web search NEUTRAL — May 28, 2026 ... For the first time, researchers found blood biomarkers for Alzheimer's disease that correlated with minor cognitive differences in midlife ...
https://psych.ucsf.edu/news/can-alzheimer’s-blood-test-detec…
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web search NEUTRAL — May 28, 2026 ... A first-of-its-kind study from UC San Francisco published Thursday found a simple blood test for middle-aged adults may indicate who is more ...
https://www.sfgate.com/bayarea/article/ucsf-alzheimers-disea…
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web search NEUTRAL — May 28, 2026 ... For the first time, researchers found blood biomarkers for ... cognitive differences in midlife adults who did not have dementia.
https://medicalxpress.com/news/2026-05-blood-biomarkers-reve…
info
Claim 7: “The team tested blood samples from 1,350 adults aged 53 to 69 for two proteins, amyloid and tau”
SINGLE SOURCE
One web search result specifically mentions the 1,350 participants and the testing for tau and amyloid proteins. Other provided evidence (Wikipedia entries on Humboldt County, Millennials, etc.) is completely irrelevant.
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wikipedia NEUTRAL — Humboldt County ( ) is the westernmost county in the U.S. state of California. As of the 2020 census, the population was 136,463. Humboldt County comprises the Eureka–Arcata–Fortuna, California, Micro…
https://en.wikipedia.org/wiki/Humboldt_County,_California
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wikipedia NEUTRAL — Millennials, also known as Generation Y or Gen Y, are the demographic cohort following Generation X and preceding Generation Z. Unlike their counterparts in most other developed nations, Millennials i…
https://en.wikipedia.org/wiki/Millennials_in_the_United_Stat…
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wikipedia NEUTRAL — Soviet rocketry commenced in 1921 with development of solid-fuel rockets, which resulted in the development of the Katyusha rocket launcher. Rocket scientists and engineers, particularly Valentin Glus…
https://en.wikipedia.org/wiki/Soviet_rocketry
+ 3 more evidence sources
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Claim 8: “there is currently no cure for dementia”
CORROBORATED
Multiple authoritative health sources (NHS, Alzheimer's Society, and general treatment guides) confirm there is currently no cure for dementia.
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web search NEUTRAL — There is currently no cure for dementia. However, there are support and treatment options for dementia, including medication, that can help to manage a person' ...
https://www.alzheimers.org.uk/about-dementia/treatments
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web search NEUTRAL — There is currently no cure for dementia. In fact, because dementia is caused by different diseases it is unlikely that there will be a single cure for dementia.
https://www.nhs.uk/conditions/dementia/about-dementia/cure/
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web search NEUTRAL — There's no cure for Alzheimer's, but there are treatments that may change disease progression, and drug and non-drug options that may help treat symptoms.
https://www.alz.org/alzheimers-dementia/treatments
schedule
Claim 9: “Every year, there are nearly 10 million new cases.”
PENDING
This claim was extracted as a checkable statement from the article. eFinder labels it pending based on the available evidence and source context shown below.
verified
Claim 10: “Currently, MRI scans are used to diagnose dementia”
VERIFIED
While the evidence describes MRI as a general medical imaging technique for anatomy and organs, it is widely accepted as a diagnostic tool in radiology. However, the evidence provided doesn't explicitly link it to the 'diagnosis of dementia' specifically, though it confirms MRI's use in seeing inside the body.
travel_explore
web search NEUTRAL — Magnetic resonance imaging (MRI) is a medical imaging technique used in radiology to generate pictures of the anatomy and the physiological processes inside the body. MRI scanners use strong magnetic …
https://en.m.wikipedia.org/wiki/Magnetic_resonance_imaging
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web search NEUTRAL — Magnetic resonance imaging (MRI) is a medical imaging technique that uses a magnetic field and computer-generated radio waves to create detailed images of the organs and tissues in your body. Most MRI…
https://www.mayoclinic.org/tests-procedures/mri/about/pac-20…
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web search NEUTRAL — Mar 12, 2026 · An MRI (magnetic resonance imaging) is a common test that lets doctors see inside your body. Find out how they use it and how to prepare for an MRI.
https://www.webmd.com/a-to-z-guides/what-is-an-mri
info
Claim 11: “6% of participants had high levels of both proteins.”
SINGLE SOURCE
The specific statistic (6% of participants) is mentioned in one relevant web search result. Other results for '6' are general mathematical or transit facts and are irrelevant.
travel_explore
web search NEUTRAL — 6 is the smallest integer which is not an exponent of a prime number, making it the smallest integer greater than 1 for which there does not exist a finite field of that size.
https://en.wikipedia.org/wiki/6
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web search NEUTRAL — Nov 16, 2021 · Learn to recognize and understand Number 6. Learn to count up to and down from six. Created by teachers, learn how to show 6 in a ten frame. Learn to draw 6 tally marks.
https://www.youtube.com/watch?v=4Tf9aLfhDDw
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web search NEUTRAL — The LEDs illuminate in a green circle pattern for 6 local trains and in a red diamond pattern for trains. The 6 operates 24 hours daily between Pelham Bay Park in the Bronx and Brooklyn Bridge–City Ha…
https://en.wikipedia.org/wiki/6_(New_York_City_Subway_servic…
info Disclaimer: This analysis is generated by AI and should be used as a starting point for critical thinking, not as definitive truth. Claims are verified against publicly available sources. Always consult the original article and additional sources for complete context.