@Pret are now selling juices in their stores. I tried the Beet Beautiful, which was a very tasty blend of beetroot, apple, carrot and ginger. This is packed with vitamin C, folate, and vitamin B6, and a great source of potassium. These are all nutrients that can help you boost your immune system ready for winter. One warning – as juicing removes the fibre from the fruit and veg you get quite a bit hit of fructose (fruit sugar) from these.  This juice contained 49g of natural sugars and is listed as containing 200kCals.