A prune is a dried

plum A plum is a fruit of some species in ''Prunus'' subg. ''Prunus'.'' Dried plums are called prunes. History Plums may have been one of the first fruits domesticated by humans. Three of the most abundantly cultivated species are not found ...

, most commonly from the European plum (''Prunus domestica''). Not all plum species or varieties can be dried into prunes. A prune is the firm-fleshed fruit (plum) of '' Prunus domestica'' varieties that have a high soluble solids content, and does not

ferment Fermentation is a metabolic process that produces chemical changes in organic substrates through the action of enzymes. In biochemistry, it is narrowly defined as the extraction of energy from carbohydrates in the absence of oxygen. In food p ...

during drying. Use of the term "prune" for fresh plums is obsolete except when applied to varieties of plum grown for

drying Drying is a mass transfer process consisting of the removal of water or another solvent by evaporation from a solid, semi-solid or liquid. This process is often used as a final production step before selling or packaging products. To be consid ...

. Most prunes are ''freestone'' cultivars (the pit is easy to remove), whereas most

s grown for fresh consumption are ''clingstone'' (the pit is more difficult to remove). Prunes are 64% carbohydrates including dietary fiber, 2% protein, a rich source of

vitamin K Vitamin K refers to structurally similar, fat-soluble vitamers found in foods and marketed as dietary supplements. The human body requires vitamin K for post-synthesis modification of certain proteins that are required for blood coagulation ...

, and a moderate source of B vitamins and dietary minerals. The

sorbitol Sorbitol (), less commonly known as glucitol (), is a sugar alcohol with a sweet taste which the human body metabolizes slowly. It can be obtained by reduction of glucose, which changes the converted aldehyde group (−CHO) to a primary alcoho ...

content of

dietary fiber Dietary fiber (in British English fibre) or roughage is the portion of plant-derived food that cannot be completely broken down by human digestive enzymes. Dietary fibers are diverse in chemical composition, and can be grouped generally by t ...

likely provides the

laxative Laxatives, purgatives, or aperients are substances that loosen stools and increase bowel movements. They are used to treat and prevent constipation. Laxatives vary as to how they work and the side effects they may have. Certain stimulant, lubri ...

effect associated with consuming prunes. Contrary to the name, boiled plums or prunes are not used to make sugar plums.

Production

More than 1,000 plum cultivars are grown for drying. The main cultivar grown in the United States is the 'Improved French' prune. Other varieties include 'Sutter', 'Tulare Giant', 'Moyer', 'Imperial', 'Italian', and

greengage The greengages are a group of cultivars of the common European plum. The first true greengage came from a green-fruited wild plum ( fa , گوجه‌سبز, Gowjehsabz) which originated in Iran (Persia). Greengages are grown in temperate areas ...

s. Fresh prunes reach the market earlier than fresh plums and are usually smaller in size. The great majority of commercially grown prune varieties are self-fertile and do not need separate pollinator trees.

Name change

In 2001, plum growers in the United States were authorized by the

Food and Drug Administration The United States Food and Drug Administration (FDA or US FDA) is a federal agency of the Department of Health and Human Services. The FDA is responsible for protecting and promoting public health through the control and supervision of food ...

to call prunes "dried plums". Due to a perception that prunes relieve

constipation Constipation is a bowel dysfunction that makes bowel movements infrequent or hard to pass. The stool is often hard and dry. Other symptoms may include abdominal pain, bloating, and feeling as if one has not completely passed the bowel moveme ...

(perceived as derogatory), some distributors stopped using the word "prune" on packaging labels in favor of "dried plums".

Health effects

Prunes contain

(about 7% of weight; table) which may provide

effects. Their

content may also be responsible for this, a conclusion reached in a 2012 review by the European Food Safety Authority. The report also demonstrated that prunes effectively contribute to the maintenance of normal bowel function in the general population if consumed in quantities of at least per day.

Nutrition

Prunes are 31% water, 64%

carbohydrate In organic chemistry, a carbohydrate () is a biomolecule consisting of carbon (C), hydrogen (H) and oxygen (O) atoms, usually with a hydrogen–oxygen atom ratio of 2:1 (as in water) and thus with the empirical formula (where ''m'' may o ...

s, including 7% dietary fiber, 2%

protein Proteins are large biomolecules and macromolecules that comprise one or more long chains of amino acid residues. Proteins perform a vast array of functions within organisms, including catalysing metabolic reactions, DNA replication, res ...

, and less than 1% fat (table). Prunes are a moderate source of

(57% of the Daily Value, DV) and a moderate source of several B vitamins and dietary minerals (4-16% DV; table).

Phytochemicals

Prunes and prune juice contain

phytochemical Phytochemicals are chemical compounds produced by plants, generally to help them resist fungi, bacteria and plant virus infections, and also consumption by insects and other animals. The name comes . Some phytochemicals have been used as poison ...

s, including

phenolic compounds In organic chemistry, phenols, sometimes called phenolics, are a class of chemical compounds consisting of one or more hydroxyl groups (— O H) bonded directly to an aromatic hydrocarbon group. The simplest is phenol, . Phenolic compounds are c ...

(mainly as

neochlorogenic acid Neochlorogenic acid is a natural polyphenol found in some dried fruits and other plant sources, such as peaches. It is an isomer of chlorogenic acid Chlorogenic acid (CGA) is the ester of caffeic acid and (−)-quinic acid, functioning as an in ...

s and chlorogenic acids) and

Uses

Prunes are used in preparing both sweet and savory dishes. Contrary to the name, boiled plums or prunes are not used to make sugar plums, which instead may be nuts, seeds, or

spice A spice is a seed, fruit, root, bark, or other plant substance primarily used for flavoring or coloring food. Spices are distinguished from herbs, which are the leaves, flowers, or stems of plants used for flavoring or as a garnish. Spices a ...

s coated with hard sugar, also called comfits.

References

{{Authority control Dried fruit Laxatives Plums