Many concentrate manufacturers add High Fructose Corn Syrup (HFCS) which they can claim to be a natural sugar, but it is very highly processed and contains zero calories This is the so called empty calories and does not need to be declared as sugar on the label since it is fructose, and the label is only required to measure and list sucrose sugar. Other forms of added sugar may be Malitol. Maltose, Dextrose, Sorbitol and other variants of sugar alcohol that again should be listed as ingredients if added, but which do not enter the sugar declaration on the label. This way manufacurers hide added sugars to products, and Malitol especially can cause bgl meter misreads. Any fruit juice from concentrate is suspect nowadays, and are industrially processed so that any goodness from the fruit is totally lost. The vitamin C has to be added back in again, and as said above, the process of pulping or juicing removes many healthy nutrients, vitamins, and phytochemicals that act as anti-oxidents when fruit is eaten raw.
My son worked in a juice produce factory here, and they had to wear full hazmat suits ( not just overalls but with helmets with built in filter and air purifiers) when the concentrate was emptied out of the drums and mixed with water. Once they had a small spillage when a drum leaked, and the factory was closed for over a week while they decontminated the place. Once mixed, the juice was placed in large settling tanks for 40 days before it became fit for human consumption. Once a batch was released too soon, and a local school had a major health scare with kids being rushed to hospital for stomach pumps and charcoal enemas. I know, because my kids were affected at the time.
I personally will not drink these concoctions (a) because I am a T2D and fructose is my enemy, and (2) there is nothing in them that is healthy (I also do not believe the adman's spiel and TV adverts aimed at the kids)
