Why is orange juice opaque?

I suspect it's the way the juice is made and filtered. Apple juice is often cloudy, as is lemonade. The grapefruit juice I drink is always opaque, like orange juice. Some grape juices (particularly those from red grapes) are dark and opaque. read more

Orange juice cloud is comprised primarily of pectin, protein, cellulose, hemicellulose, some lipids, and small quantities of entangled bioflavonoids. Of these components pectin and protein are the most abundant, accounting for approximately one third and one half of the insoluble material respectively (Baker and Bruemmer, 1969, Braddock, 1999, Gattuso et al., 2007 and Scott et al., 1965). read more

I've always wondered why some juices are usually clear (can be seen through, look like tinted water) and some are non-transparent. Examples of clear juices are: Apple*, Cherry, Pomegranate, Cranberry, Pineapple*. *Some Apple juices can be seen opaque. Portion of Pineapple juice can be opaque. Examples of opaque juices: Orange, Tomato, Carrot. read more

To make "not from concentrate" OJ they take fresh juice and pasteurize it and then remove all the oxygen from it so that it can be stored in large tanks for up to a year. read more