Synopsis

Source of validity: Scientific
Rating (out of 5): 3

Camellia sinensis, the plant species whose leaves and buds are used to produce tea (green, black, oolong, and white teas), has been studied for its effects on cardiovascular health, including support for the arteries. The primary active compounds in tea, such as catechins (especially epigallocatechin gallate, EGCG), have demonstrated antioxidant and anti-inflammatory properties. Multiple epidemiological studies suggest that regular consumption of tea is associated with a reduced risk of cardiovascular diseases, including atherosclerosis and coronary artery disease. Mechanistically, catechins may improve endothelial function, reduce blood pressure, and decrease LDL cholesterol oxidation, all of which are relevant to arterial health.

Clinical trials and meta-analyses provide moderate support for these benefits. A 2011 meta-analysis published in the American Journal of Clinical Nutrition concluded that green tea consumption significantly lowers total and LDL cholesterol. Other studies have reported improvements in arterial function, such as enhanced flow-mediated dilation. However, the effects are generally modest, and not all trials have shown significant improvements. Additionally, the majority of evidence points to green tea as having the strongest effects, while the impact of black tea is less consistent.

In summary, there is moderate scientific evidence supporting the use of Camellia sinensis for arterial health, particularly due to its antioxidant effects and influence on cholesterol and vascular function, though results are not uniformly strong across all studies.

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