Blackcurrant leaves from Ribes nigrum L. contain polyphenols, flavonoids, quercetin, and rutin – powerful antioxidant compounds that differ from those found in fruit extracts. According to the European HMPC committee, the leaves have diuretic effects, help reduce mild joint inflammation and allergic skin inflammation, and support cardiovascular health. In addition, blackcurrant leaves help reduce inflammation and strengthen cardiovascular health.