The Ribus nigrum is a delicious, nutritious berry that grows in northern Asia, northern Europe and central Europe. The juice of the blackcurrant is called cassis and forms the basis of this well-known carbonated drink. The blackcurrant is rich in vitamins, antioxidants and minerals. As well as Vitamin C and E, the blackcurrant also contains Vitamins B1, B2, B5 and B6 and the minerals calcium, magnesium, potassium, iron and phosphorous. It is also rich in Omega 3 fatty acids, which makes it good for the blood vessels.