- Black Currant is a great reservoir of minerals and vitamins, in particular vitamin C. It has cleansing, diuretic, perspiration increasing and antipyretic activities, helps support to increase physical resistance to irritations and is a valuable medication for managing coughs and colds. Black Currant is used in addition to other medications to deal with Arthralgia and help stimulate the immune system. By stimulating the reduction of liquids, Black Currant helps minimize blood volume and thereby c