“This is an unusual suspect,” Dr. Daryl Gioffre, Founder of Alkamind and celebrity nutritionist, says. The fruit itself has fiber but it has all been lost during the process of making the juice, he adds. Fruit juices in stores are pasteurized, which means that all nutrition that is heat- sensitive gets destroyed and what remains is just lots of sugar. Orange juice has 18 grams of fructose per once, he adds. Unless you squeeze it yourself, skip it.