New Blood Test for Alzheimer's

Candid Conversations With Dr Lowe

The FDA has just cleared a new blood test for Alzheimer’s—and it could be a game changer. In this video, we break down how the Lumipulse G pTau217/β-Amyloid 1-42 Plasma Ratio test works, what it tells doctors, and why it matters for early diagnosis. For the first time, doctors may be able to detect signs of Alzheimer’s with a simple blood draw—no spinal taps or expensive brain scans required. This means earlier detection, faster answers, and greater access to care—especially in primary care settings. But what does the test measure? Can it be used on its own? And how close are we to diagnosing Alzheimer’s before symptoms even begin?  Whether you're concerned about memory loss, caring for a loved one, or simply curious about this new Alzheimer’s blood test, this video explains everything you need to know—in plain language

Transcript

00:00On May the 16th, 2025, the FDA cleared a new blood test that could change the way we diagnose Alzheimer's disease.

00:10It is called the LumiPulse G P-TAL-217 to Beta Amyloid 142 Plasma Ratio Test, a long name for a powerful tool.

00:23This test is designed for persons over the age of 55 who show signs of cognitive decline.

00:31Until now, diagnosing Alzheimer's has relied on memory tests, spinal fluid analyses, and costly brain scans known as PET scans.

00:42But now, with a simple blood test, doctors can get important clues as to whether Alzheimer's is present, and they can do it earlier and easier.

00:55This means fewer invasive tests, faster results, and more access for patients, even outside of specialist clinics.

01:04Still, it is important to know that this is not a standalone test.

01:10It still must be used alongside a full clinical evaluation by a medical provider.

01:17Why does early detection matter?

01:20Because the medications we have today work better in early stages of the disease.

01:26And the test may help catch Alzheimer's before it progresses, when treatments can still make a difference.

01:35It may even help doctors track the progress of the disease and how well treatments are working over time.

01:44So how does the test work?

01:46It looks at two proteins that build up in the blood of patients with Alzheimer's.

01:50The P-tau-217 and the beta-amyloid-142.

01:59In Alzheimer's disease, amyloid builds up in between the cells, and this triggers the tau proteins to clump together inside the cells,

02:09forming what are called neurofibrillary tangles.

02:13These changes, plaques and tangles, are the hallmarks of the disease.

02:19The Lumi-pulse test measures the ratio of these two proteins in the blood,

02:25and this tells doctors how likely it is that these changes are already happening in the brain.

02:32This breakthrough brings Alzheimer's testing one step closer to being faster, easier, and more accessible,

02:41giving patients the answers they need sooner.

02:46I hope you found this video informative.

02:48If you did, like and share the video with your friends and family.

02:52Leave your comments in the section below.

02:55And you can support this channel by subscribing.

02:59Until the next video, stay healthy and stay safe.

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