Could an ancient drink protect our brain from the effects of aging? A Japanese study reveals that green tea, thanks to its antioxidant compounds, could reduce age-related brain damage.
Aging is often accompanied by brain changes, such as the appearance of white matter lesions, which are associated with an increased risk of cognitive decline. Researchers from theKanazawa University explored the role of green tea in prevention of these anomalies. Their results, published in npj Science of Foodsuggest that this drink could offer unique protection.
White matter lesions: a marker of brain aging
The white matter, essential for communication between different regions of the brain, is often damaged with age. These lesions, visible by MRI, are linked to cognitive disorders and diseases such as dementia. The Japanese study analyzed nearly 9,000 participants aged 65 and over, revealing a correlation between green tea consumption and a reduction in these lesions.
People who drank three or more cups of green tea per day had a 3% lower volume of lesions than those who drank less. This figure reached 6% for large consumers. In contrast, coffee showed no significant effect on these abnormalities.
Catechins, protective compounds
Green tea contains catechins, molecules with antioxidant and anti-inflammatory properties. These compounds, including epigallocatechin gallate, act on blood vessels, reducing oxidative stress and brain damage. Although the study did not establish a direct causal link, these mechanisms could explain the observed benefits.
The researchers point out that these effects are more marked in individuals without depression or a genetic predisposition to Alzheimer’s disease. This suggests that the benefits of green tea also depend on individual factors.
A prevention to qualify
While green tea seems promising, it should not be considered a miracle solution. The authors recall the importance of a global approach to preserving brain health: balanced diet, physical activity Regular and medical monitoring remain essential.
-Further studies are needed to confirm these results and explore the mechanisms at play. In the meantime, integrating green tea into your daily life could be a simple gesture to protect your brain from aging.
To go further: What is the white matter of the brain?
White matter is an essential part of the brain, composed mainly of nerve fibers covered in myelin. This myelin, a protective sheath, allows rapid transmission of electrical signals between different brain regions. Without it, neuronal communication would be slowed or impaired.
With age, white matter can suffer damage, often linked to vascular problems. These lesions, visible by medical imaging, are associated with an increased risk of cognitive disorders, such as dementia or Alzheimer’s disease. They affect the brain’s ability to process information effectively.
White matter lesions are often caused by poor blood supply, due to hypertension or atherosclerosis. These conditions damage the small blood vessels that supply the brain, leading to micro-lesions. Oxidative stress and inflammation also play a role in this process.
Preserving the health of white matter is therefore essential to maintain cognitive functions. Healthy lifestyle habits, such as a balanced diet and regular physical activity, can help protect this brain structure and reduce the risk of cognitive decline.
