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Heghine Khachatryan: The Overlooked Link Between Homocysteine and Brain Health

Heghine Khachatryan/LinkedIn

Mar 5, 2026, 14:18

Heghine Khachatryan: The Overlooked Link Between Homocysteine and Brain Health

Heghine Khachatryan, Editor-in-Chief of Hemostasis Today, Head of Hemophilia and Thrombosis Center at Yeolyan Hematology and Oncology Center, shared Neuro Thrive Limited’s post on LinkedIn, adding:

” Homocysteine and Brain Health — An Often Overlooked Connection

Homocysteine is widely known as a cardiovascular risk marker, but its impact extends far beyond the heart. Elevated homocysteine levels can significantly affect brain health and neurological function.

Research has associated increased homocysteine with:

Higher risk of stroke
Memory impairment and cognitive decline
Increased risk of depression
Accelerated neurodegenerative processes

The mechanism involves vascular damage, oxidative stress, and impaired methylation pathways, which can affect neuronal function and cerebral circulation. Importantly, homocysteine levels are modifiable.

Adequate intake of folate (B9), vitamin B12, vitamin B6, and betaine, along with proper metabolic assessment, can help regulate homocysteine metabolism and reduce potential neurological risks.

Monitoring homocysteine is particularly relevant in patients with:

cardiovascular disease
thrombotic disorders
cognitive complaints
vitamin deficiencies

Understanding and addressing metabolic risk factors is a key step toward protecting long-term brain health. ”

Quoting Neuro Thrive Limited’s post:

”Most people associate homocysteine with heart disease.

But what if one of its biggest impacts is actually on the brain?

Homocysteine is a natural by-product of protein metabolism. Under normal circumstances, the body recycles it efficiently using vitamin B12, folate and B6 through a process called methylation.

When that system slows down, homocysteine rises.

And the brain feels it.

Elevated homocysteine has been linked to:

Reduced cerebral blood flow
Increased oxidative stress
Neurotransmitter imbalance
Cognitive decline
Higher stroke risk

The brain is metabolically demanding. It relies on stable blood supply, low inflammation and precise chemical signalling. Homocysteine sits at the centre of all three.

What makes this particularly important is that homocysteine is measurable — and in many cases, modifiable.

We routinely test cholesterol.

We rarely test homocysteine.

Yet elevated homocysteine may signal impaired methylation, B-vitamin insufficiency, or underlying metabolic stress long before more serious neurological issues develop.

As conversations around brain health, dementia prevention and mental resilience grow, it may be time we pay closer attention to this overlooked marker.

Sometimes the most important numbers are the ones we’re not measuring.”

Heghine Khachatryan: The Overlooked Link Between Homocysteine and Brain Health