Evidence supporting the use of: Escin
For the body system: Capillaries

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Synopsis

Source of validity: Scientific
Rating (out of 5): 4

Escin, a natural mixture of saponins extracted from horse chestnut seeds (Aesculus hippocastanum), is scientifically validated for supporting capillary health, particularly in the context of chronic venous insufficiency (CVI) and related vascular disorders. Multiple randomized, double-blind, placebo-controlled clinical trials and meta-analyses have demonstrated that escin can reduce symptoms such as leg swelling (edema), pain, and heaviness linked to capillary fragility and vascular insufficiency. The proposed mechanism is escin’s ability to improve venous tone, decrease capillary permeability, and exert anti-inflammatory effects, thereby enhancing microcirculation and capillary integrity.

A 2012 Cochrane review concluded that horse chestnut seed extract (standardized to escin) is more effective than placebo for short-term treatment of CVI symptoms. Additional studies have reported that escin reduces transcapillary filtration and strengthens capillary walls, helping to prevent leakage of fluid into surrounding tissues. The European Medicines Agency (EMA) also recognizes the traditional and well-established use of horse chestnut seed extracts for symptomatic relief of discomfort and heaviness of legs related to minor venous circulatory disturbances.

In summary, escin’s use for supporting the capillaries and vascular system is well-supported by scientific evidence, particularly for improving symptoms of venous insufficiency and reducing capillary permeability. However, most research pertains to chronic venous disorders rather than general capillary health in healthy populations.

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