Chokeberry (Aronia melanocarpa) has been traditionally used in some cultures for its general health benefits, but its use to support capillary health is primarily supported by modern scientific research. Chokeberries are rich in polyphenols, especially anthocyanins and proanthocyanidins, which are compounds known for their antioxidant properties. Several in vitro and in vivo studies have investigated the vascular protective effects of chokeberry extracts. These studies suggest that chokeberry polyphenols can improve endothelial function, decrease oxidative stress, and reduce inflammation within blood vessels, all of which are important for maintaining capillary integrity.

Specific research has shown that chokeberry extract can reduce capillary fragility and permeability. For example, clinical trials have found that supplementation with chokeberry extract improves vascular function in patients with metabolic syndrome and reduces markers of oxidative damage in blood vessels. Furthermore, animal studies indicate that chokeberry can reduce blood pressure and strengthen vascular walls, likely by enhancing nitric oxide production and reducing inflammation.

However, while the mechanistic and preliminary clinical data are promising, large-scale, long-term human trials directly linking chokeberry supplementation to improved capillary health are still limited. Thus, the scientific evidence is moderate (rated 3 out of 5), supporting its use for capillary support but not yet conclusive.