Ditch that juice!
All store-bought juices start at the same place - as a fruit or vegetable growing in a field. But from here, they take a long path to that bottle in the shop. The first step is to actually extract the juice from the fruit. This isn't a gentle process. These fruits and vegetables are put into an ultra-speed commercial centrifugal unit. This causes heat and oxidation, damaging their valuable phytonutrients. From there, most juices are pasteurized to allow them to be stored long periods. This involves "cooking" the juice for 45 minutes at 110 degrees. At this point, the juice is rendered sterile - free of impurities but also of most nutrients as well.
But that's not all. Now the cooked juice is reduced to a concentrate - 80% of the water content is removed. This makes it much easier to store and ship. This concentrate is then combined with water and other juice concentrates according to the recipe involved. At this point, additional ingredients are put in including synthetic vitamins and minerals, sweeteners, colorings, and "flavor packs". Then this "juice" is put into a bottle or carton with a picture of healthy fresh produce. Even if you read the label, it's easy to be fooled because there will often be listed just fruit juices and "natural flavorings and colorings", along with an impressive list of vitamins (which were chemically added later). Not all store-bought juices are created equal. If you are going to buy juice from the store, the most important thing is to look carefully at the label. It is rare, but possible, to find bottled juices noted as "not pasteurized" and "not from concentrate". Even better, look for "organic" juice if you want to avoid possible pesticide residues. Some stores are now offering fresh-pressed juice with a shelf-life of a few days. Look for "cold-pressed" fresh juice, meaning it hasn't been processed in a high speed, high-temperature centrifuge. And check the date. Fresh juice deteriorates rapidly, and is best consumed the day it was made.