Peel, also known as rind or skin, is the outer protective layer of a

fruit In botany, a fruit is the seed-bearing structure in flowering plants (angiosperms) that is formed from the ovary after flowering. Fruits are the means by which angiosperms disseminate their seeds. Edible fruits in particular have long propaga ...

vegetable Vegetables are edible parts of plants that are consumed by humans or other animals as food. This original meaning is still commonly used, and is applied to plants collectively to refer to all edible plant matter, including edible flower, flo ...

which can be peeled off. The rind is usually the

botanical Botany, also called plant science, is the branch of natural science and biology studying plants, especially Plant anatomy, their anatomy, Plant taxonomy, taxonomy, and Plant ecology, ecology. A botanist or plant scientist is a scientist who s ...

exocarp Fruits are the mature ovary or ovaries of one or more flowers. They are found in three main anatomical categories: aggregate fruits, multiple fruits, and simple fruits. Fruitlike structures may develop directly from the seed itself rather th ...

, but the term exocarp also includes the hard cases of

nuts Nut often refers to: * Nut (fruit), fruit composed of a hard shell and a seed * Nut (food), a dry and edible fruit or seed, including but not limited to true nuts * Nut (hardware), fastener used with a bolt Nut, NUT or Nuts may also refer to: A ...

, which are not named peels since they are not peeled off by hand or peeler, but rather shells because of their hardness. A fruit with a thick peel, such as a

citrus ''Citrus'' is a genus of flowering trees and shrubs in the family Rutaceae. Plants in the genus produce citrus fruits, including important crops such as oranges, mandarins, lemons, grapefruits, pomelos, and limes. ''Citrus'' is nativ ...

fruit, is called a

hesperidium A hesperidium (: hesperidia) is a modified berry with a tough, leathery rind, as in the oranges and lemons of the genus ''Citrus''. Etymology Carl Linnaeus gave the name Hesperideæ to an order containing the genus ''Citrus'', in allusion to ...

. In hesperidia, the inner layer (also called ''

albedo Albedo ( ; ) is the fraction of sunlight that is Diffuse reflection, diffusely reflected by a body. It is measured on a scale from 0 (corresponding to a black body that absorbs all incident radiation) to 1 (corresponding to a body that reflects ...

'' or, among non-botanists, ''pith'') is peeled off together with the outer layer (called

flavedo Fruits are the mature ovary or ovaries of one or more flowers. They are found in three main anatomical categories: aggregate fruits, multiple fruits, and simple fruits. Fruitlike structures may develop directly from the seed itself rather than ...

), and together they are called the peel. The flavedo and albedo, respectively, are the

and the

mesocarp Fruits are the mature ovary or ovaries of one or more flowers. They are found in three main anatomical categories: aggregate fruits, multiple fruits, and simple fruits. Fruitlike structures may develop directly from the seed itself rather tha ...

. The juicy layer inside the peel (containing the seeds) is the

endocarp Fruits are the mature ovary or ovaries of one or more flowers. They are found in three main anatomical categories: aggregate fruits, multiple fruits, and simple fruits. Fruitlike structures may develop directly from the seed itself rather th ...

Uses

Depending on the thickness and taste, fruit peel is sometimes eaten as part of the fruit, such as with

apple An apple is a round, edible fruit produced by an apple tree (''Malus'' spp.). Fruit trees of the orchard or domestic apple (''Malus domestica''), the most widely grown in the genus, are agriculture, cultivated worldwide. The tree originated ...

s. In some cases the peel is unpleasant or inedible, in which case it is removed and discarded, such as with

banana A banana is an elongated, edible fruit – botanically a berry – produced by several kinds of large treelike herbaceous flowering plants in the genus '' Musa''. In some countries, cooking bananas are called plantains, distinguishing the ...

s or

grapefruit The grapefruit (''Citrus'' × ''paradisi'') is a subtropical citrus tree known for its relatively large, sour to semi-sweet, somewhat bitter fruit. The flesh of the fruit is segmented and varies in color from pale yellow to dark red. Grapefru ...

s. The peel of some fruits—for example,

pomegranates The pomegranate (''Punica granatum'') is a fruit-bearing deciduous shrub in the family Lythraceae, subfamily Punicoideae, that grows between tall. Rich in symbolic and mythological associations in many cultures, it is thought to have originat ...

—is high in

tannin Tannins (or tannoids) are a class of astringent, polyphenolic biomolecules that bind to and Precipitation (chemistry), precipitate proteins and various other organic compounds including amino acids and alkaloids. The term ''tannin'' is widel ...

s and other

polyphenol Polyphenols () are a large family of naturally occurring phenols. They are abundant in plants and structurally diverse. Polyphenols include phenolic acids, flavonoids, tannic acid, and ellagitannin, some of which have been used historically as ...

s, and is employed in the production of

dye Juan de Guillebon, better known by his stage name DyE, is a French musician. He is known for the music video of the single "Fantasy Fantasy is a genre of speculative fiction that involves supernatural or Magic (supernatural), magical ele ...

s. The peel of

citrus fruit ''Citrus'' is a genus of flowering plant, flowering trees and shrubs in the family Rutaceae. Plants in the genus produce citrus fruits, including important crops such as Orange (fruit), oranges, Mandarin orange, mandarins, lemons, grapefruits, ...

s is bitter and generally not eaten raw, but may be used in cooking. In gastronomy, the outermost, colored part of the peel is called the zest, which can be scraped off and used for its tangy flavor. A large piece of citrus peel, called a " twist", is often used to garnish

cocktail A cocktail is a mixed drink, usually alcoholic beverage, alcoholic. Most commonly, a cocktail is a combination of one or more liquor, spirits mixed with other ingredients, such as juices, flavored syrups, tonic water, Shrub (drink), shrubs, and ...

s. The fleshy white part of the peel, bitter when raw in most species, is used as

succade Succade is the candied peel of any of the citrus species, especially from the citron or ''Citrus medica'' which is distinct with its extra-thick peel; in addition, the taste of the inner rind of the citron is less bitter than those of the other ...

or is prepared with

sugar Sugar is the generic name for sweet-tasting, soluble carbohydrates, many of which are used in food. Simple sugars, also called monosaccharides, include glucose Glucose is a sugar with the Chemical formula#Molecular formula, molecul ...

to make

marmalade Marmalade (from the Portuguese ''marmelada'') is a fruit preserves, fruit preserve made from the juice and peel of citrus fruits boiled with sugar and water. The well-known version is made from bitter orange. It also has been made from lemons ...

fruit soup Fruit soup is a soup prepared using fruit as a primary ingredient, and may be served warm or cold depending on the recipe. Some fruit soups use several varieties of fruit, and alcoholic beverages such as rum, sherry and kirsch (a fruit brandy) m ...

. The peel can also be

candied Candied fruit, also known as glacé fruit, is whole fruit, smaller pieces of fruit, or pieces of peel, placed in heated sugar syrup, which absorbs the moisture from within the fruit and eventually preserves it. Depending on the size and type o ...

, or dried to produce a seasoning (e.g.,

chenpi Chenpi, chen pi, or chimpi is sun-dried mandarin orange peel used as a traditional seasoning in Chinese cooking and traditional medicine. It is aged by storing the peels dry. The taste is first slightly sweet, but the aftertaste is pungent and ...

Nutrition

In a 100 gram reference amount, raw orange peel supplies 97

calorie The calorie is a unit of energy that originated from the caloric theory of heat. The large calorie, food calorie, dietary calorie, kilocalorie, or kilogram calorie is defined as the amount of heat needed to raise the temperature of one liter o ...

s, with

dietary fiber Dietary fiber (fibre in English in the Commonwealth of Nations, Commonwealth English) 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 co ...

and

vitamin C Vitamin C (also known as ascorbic acid and ascorbate) is a water-soluble vitamin found in citrus and other fruits, berries and vegetables. It is also a generic prescription medication and in some countries is sold as a non-prescription di ...

in rich content having 42% and 227% of the

Daily Value In the U.S. and Canada, the Reference Daily Intake (RDI) is used in nutrition labeling on food and dietary supplement products to indicate the daily intake level of a nutrient that is considered to be sufficient to meet the requirements of 97� ...

(DV), respectively.

Calcium Calcium is a chemical element; it has symbol Ca and atomic number 20. As an alkaline earth metal, calcium is a reactive metal that forms a dark oxide-nitride layer when exposed to air. Its physical and chemical properties are most similar to it ...

content is 16% of the DV, with no other

micronutrient Micronutrients are essential chemicals required by organisms in small quantities to perform various biogeochemical processes and regulate physiological functions of cells and organs. By enabling these processes, micronutrients support the heal ...

s in significant amounts. A serving of raw orange peel provides 63% DV for vitamin C and 12% DV for dietary fiber.

References

{{reflist Fruit

Uses

Nutrition

See also

References