However, no food colorants produced by this technology have been commercialized. There are a wide range of unit operations and process variables encountered in fruit and vegetable juice production. There are enzymes that are used as processing aids to increase pigment recovery and improve stability. There are different filtration, microfiltration, evaporation, and resin treatment technologies that can enrich pigment content,
remove flavors, and prevent sediment formation. Hence, the functionality of fruit or vegetable juice concentrates from different suppliers can vary tremendously