果汁是指从新鲜水果榨汁而成的一种饮料，广义上也包括由蔬菜榨汁而成的蔬菜汁。各种不同水果的果汁含有不同的维生素等营养，而被视为是一种对健康有益的饮料，但其缺乏水果所有的纤维素和过高的糖分有时被视为其缺点。目前的果汁分为浓缩果汁、浓缩还原果汁和非浓缩还原果汁。其中浓缩还原果汁最为常见，是以浓缩果汁按照一定比例与水和其他配料勾兑而成，非浓缩还原果汁即鲜榨果汁，有着最高的质量，但保存较为不便，且价格普遍较为昂贵。

蔬果汁是由机械的挤榨或压榨出的新鲜水果或蔬菜肉制成的，无需使用高温或是溶解剂。例如，橙汁就是橙子树上的水果压榨（而非萃取）汁液。蔬果汁可以在家通过使用各种手动的或电动的榨汁机压榨新鲜水果与蔬菜制成。

Juice is a liquid (drink) that is naturally contained in fruit and vegetables. It can also refer to liquids that are flavored with these or other biological food sources such as meat and seafood. It is commonly consumed as a beverage or used as an ingredient or flavoring in foods or other beverages. Juice emerged as a popular beverage choice after the development of pasteurization methods allowed for its preservation without fermentation. The Food and Agriculture Organization of the United Nations (FAO) estimated the total world production of citrus fruit juices to be 12,840,318 tonnes in 2012.