Corinthian black currant. Black currant is one of the most important Greek superfoods, as it is rich in polyphenols, trace elements, unsaturated fiber, zinc, magnesium, iron, potassium and manganese. It also contains antioxidant Vitamin C, which contributes to the absorption of iron, as well as vitamins A, B-6, B-12 and E. It is derived from viable organic, natural shade and sulfur-free drying.