Evidence supporting the use of: Green tea
For the health condition: Circulation (to the brain)

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Synopsis

Source of validity: Scientific
Rating (out of 5): 2

Green tea (Camellia sinensis) is sometimes used to support brain circulation and cognitive health. The justification for its use is primarily scientific, though the evidence is still emerging and not robust. Green tea is rich in polyphenolic compounds, notably epigallocatechin gallate (EGCG), which have antioxidant and vasodilatory properties. Several preclinical studies suggest that these compounds can improve endothelial function, promote vasodilation via increased nitric oxide production, and reduce oxidative stress, all of which could theoretically support cerebral blood flow. Some small-scale human studies and population-based research have linked regular green tea consumption with improved cognitive performance and a lower risk of cognitive decline, potentially due to effects on vascular function. For instance, a few randomized controlled trials have noted modest improvements in working memory and attention following acute green tea extract consumption, and neuroimaging studies suggest increased activity in brain areas associated with memory. However, direct evidence specifically demonstrating improved cerebral circulation in humans from green tea supplementation is limited, and most research does not isolate this mechanism from other potential benefits. In summary, while there is some scientific rationale and preliminary evidence suggesting green tea may support brain circulation and cognitive function, large-scale, well-controlled human trials are needed to confirm these effects and determine their clinical significance.

More about green tea
More about Circulation (to the brain)

Other health conditions supported by green tea

Abdominal Pain
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