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Honda R&D, the independent research and development arm of Honda Motor Company, has signed a multi-year joint research agreement with California-based battery technology company QuantumScape. The deal, announced on Thursday, is focused on developing and manufacturing solid-state battery cells.
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I called Xiaomi and Leica's Leitzphone "the best camera phone I have ever used" when I reviewed it in March, and I meant it. This phone has some astonishing chops when it comes to taking images that arguably make it more of a camera than a phone. But it's not the only phone I've said…
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The electric toothbrushes in this section weren't my favorites, but they have some qualities worth mentioning. One of these might be the right choice for you, so we felt it was worthwhile to include them.
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If you’ve been scammed, it can feel impossible to navigate. Online scams result in lost funds, loss of access to important accounts or devices, damage to reputation and other harms. And with the rise of highly sophisticated AI scams, it’s harder than ever to protect yourself.
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June 23, 2026
A new study of more than 2,000 older adults found that higher blood levels of vitamin C were associated with healthier brain structure and stronger neural connectivity.
Researchers linked vitamin C levels to the preservation of gray matter and the brain's default mode network, which plays a key role in memory and cognition.
Scientists caution that the study shows an association, not proof that vitamin C prevents cognitive decline or dementia.
Theres new evidence to suggest that diet plays a key role in how people age. The latest study recommends a diet with plenty of vitamin C.
Researchers in Japan have found that older adults with higher levels of vitamin C in their blood tended to have healthier brain structures and stronger connectivity in regions associated with memory and cognitive function. The findings, published in the journal PLOS One, add to growing evidence that nutrition may play an important role in brain health as people age.
The study analyzed data from 2,044 adults aged 65 and older who participated in a community health project in Hirosaki City, Japan. Researchers measured vitamin C levels through blood samples and compared the results with MRI scans that assessed brain volume and neural connectivity.
Reduced gray matter volume
Participants with lower vitamin C levels were more likely to show reduced gray matter volume and weaker connectivity within the brain's default mode network, a collection of brain regions involved in memory, attention, and self-reflection. Changes in this network have previously been linked to cognitive decline and neurodegenerative diseases such as Alzheimer's.
"Our study demonstrates that older adults with higher blood levels of vitamin C tend to have better-preserved brain structure and stronger connections within the default mode network," lead researcher Tomohiro Shintaku of Hirosaki University said in discussing the findings.
One of the study's notable features is its use of direct blood measurements rather than estimates of dietary intake. Previous research has linked diets rich in vitamin C to better cognitive outcomes, but few studies have examined how actual blood concentrations relate to brain structure.
Researchers adjusted for a variety of factors that can influence brain health, including age, education, physical activity, and chronic health conditions.
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