Reconstituted juice is a product produced from a juice concentrate that has been diluted with the same amount of water that was taken away during the concentration process. Juice Concentrate. Juice concentrate is produced commercially by concentrating juice to a defined Brix by evaporation.Depending on the type, it may offer some essential nutrients, including vitamins and minerals.To make juice concentrate, whole fruits are thoroughly washed, scrubbed, and crushed or blended to produce a pulp. Most of the water content is then extracted and evaporated .Because the fruit’s natural flavor may become diluted as a result, many companies use additives like flavor packs, which are artificial compounds made from fruit byproducts