Not all store-bought juices are made the same way. If you are going to buy juice in the store, the most important thing is to look closely at the label. It's rare, but possible, to find bottled juices that aren't pasteurized or made from concentrates. Better yet, look for organic juice if you want to avoid potential pesticide residues.
Some stores now offer freshly squeezed juice with a shelf life of a few days. Look for fresh cold-pressed juice, which means it hasn't been processed in a high-speed, high-temperature centrifuge. Fresh juice deteriorates quickly and is best consumed the day it was made. Other juice companies press their ingredients separately, in large quantities, and then combine the juices to create a mix.
Cold-pressed juices have significantly more vitamins, minerals, antioxidants, digestive enzymes, and other nutrients compared to regular juices made with heat. Some juice bars offer pre-bottled juice, but it's much better to take the extra time and order freshly prepared juice. If you find a juice bar that uses this type of juicer (such as the Kuvings Chef or Sana Horeca), you can be sure that the juice will have the highest nutritional value and the best flavor. The real cost of these juices is somewhere between the standard cost of doing business and the fact that juice bars sell more than liquefied fruits and vegetables.
Cold-pressed juice is the third fastest-growing category in grocery stores, and in some larger stores, there's now a full refrigerator dedicated to bottles of brightly colored squeezed fruits and vegetables.