Walnuts are top of the tree when it comes to heart healthy nutty superfoods, research has shown. The Christmas favourites are packed with more potent and abundant antioxidants  than any other popular nut, as well as healthy fibre, protein, vitamins and minerals. Tree and ground nuts are generally said to be among nature’s most perfect ready made foods. Research suggests regular consumption of nuts can reduce the risk of heart disease, certain cancers and type-2 diabetes. But until now it has not been clear which nut is number 1 in terms of health giving properties.