What if the vitamins you overlook each day are quietly shaping your memory, your focus, and your long-term risk of dementia?

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Hello and welcome to Dr. Mercola's cellular wisdom. I'm Ethan Foster, and today we're examining how vitamins K and A influence your brain. What recent studies reveal about

vitamin K analogs that reach your neurons, why higher levels of MK4 and brain tissue

align with lower dementia risk, and how

vitamin A's active form, retinohic acid, supports synaptic plasticity and memory.

I'm here to guide the discussion and keep it practical for you.

I'm Alara Sky, and I'll help unpack the findings so you can understand what they mean

for your cognition as you age.

We'll connect the lab work to clear actions you can take, centered on food choices and smart combinations,

without drifting beyond what the research describes.

Researchers recently modified vitamin K molecules and tested whether these analogs could cross the

blood-brain barrier and convert into the bioactive form your brain stores, Menequinone 4, or

MK4. Among the 12 versions they engineered, one, referred to as compound 7, stood out because

it reached the brain after oral intake and was metabolized

into mK4. That matters because many substances never make it past the brain's tight security,

which is a major hurdle for therapies aimed at neurons. The same compound didn't just arrive.

It acted. In neural precursor models, it promoted the shift from immature cells to fully

differentiated neurons capable of signaling. It also activated nuclear receptors tied to gene expression,

including retinohic acid receptors, and the steroid and xenobiotic receptor.

Modeling suggested stronger binding to the M-G-L-U-R-1 receptor,

...