Prunes may provide a natural laxative effect, and prune juice may serve as a natural laxative for cases of mild constipation. The concentrate has a high sugar content, and is used by food processors to enhance the flavor of and sweeten products, as a humectant to retain moisture in cookies and cakes, and as an ingredient in cereal bars to bind the ingredients. Prune juice is also produced as a concentrate, whereby low temperature water is used to create a liquid extract. The process of heating and extraction may occur several times with the same batch of prunes, with the collective extracts from each processing then mixed together to create the final product. Prune juice is often produced using hot extraction methods, whereby the prunes are cooked in hot water, becoming a liquid extract, which is then processed into juice. Prune juice and plums contain phytochemicals, including phenolic compounds (mainly as neochlorogenic acids and chlorogenic acids) and sorbitol. In a reference amount of 100 grams (3.5 oz), canned prune juice supplies 71 calories, and is a moderate source of vitamin B6 (17% of the Daily Value), with no other micronutrients in significant content (table). In the United States, bottled or canned prune juice contains 'not less than 18.5% by the weight of water-soluble solids extracted from dried plums'. Prune juice is 81% water, 17% carbohydrates, 0.6% protein, and contains negligible fat. It is an ingredient in many cocktails, such as the Purple Dragon, or Constipolitan. It is also sometimes used as a flavor enhancer in tobacco products.

It may be used as a dietary supplement to act as a laxative. It is a mass-produced product that is often produced using a hot extraction method, and juice concentrate is typically produced using a low-temperature extraction method.

Prune juice is a fruit juice derived from prunes (dried plums) that have been rehydrated. †Percentages are roughly approximated using US recommendations for adults.

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