Green tea, packed with antioxidants, may do more than refresh your afternoon — it could actually protect your brain. New research suggests it helps reduce white matter lesions, a key sign of aging in the brain. Here’s how this humble beverage might play a role in preventing cognitive decline.

As people age, their brains naturally undergo structural changes. One of the most telling signs is the formation of white matter lesions, which are often linked to dementia and other forms of cognitive decline. While diet plays a major role in brain health, scientists are now focusing on specific drinks — and green tea is at the top of that list. A recent Japanese study published in Nature found a promising connection between regular green tea consumption and fewer white matter lesions in older adults.

How Green Tea Supports Brain Health

Green tea’s secret lies in its catechins — antioxidant compounds with powerful anti-inflammatory effects. These molecules protect both blood vessels and nerve cells, helping to reduce damage caused by oxidative stress. In the Japanese study, participants who drank at least three cups a day showed significantly fewer white matter lesions than those who drank less.

Researchers believe this effect may stem from green tea’s ability to lower blood pressure and improve circulation. By easing high blood pressure, it helps ensure a steady flow of oxygen and nutrients to the brain, reducing the risk of tiny but damaging micro-lesions.

A Simple Habit with Big Potential

White matter lesions are often considered early warning signs of dementia. Reducing them could be key to maintaining mental sharpness with age. While the findings are still preliminary, they suggest that something as simple as drinking green tea could support long-term brain health.

That said, the benefits appear strongest in people without major risk factors — like chronic depression or certain genetic predispositions. It’s another reminder that true brain protection comes from a holistic approach: balanced nutrition, regular exercise, and consistent medical care.

In the end, green tea may turn out to be more than a soothing ritual — it could be a genuine ally in protecting cognitive function. Still, researchers caution that further studies are needed to confirm the results and shape future health recommendations.