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Chili peppers, also spelled chile or chilli ( ), are varieties of berry-fruit plants from the genus Capsicum, which are members of the nightshade family Solanaceae, cultivated for their pungency. They are used as a spice to add pungency (spicy heat) in many cuisines. Capsaicin and the related capsaicinoids give chili peppers their intensity when ingested or applied topically. Chili peppers exhibit a range of heat and flavors. This diversity is the reason behind the availability of different types of chili powder, each offering its own taste and heat level.
Chili peppers originated in Central or South America and were first cultivated in Mexico. European explorers brought chili peppers back to the Old World in the late 16th century as part of the Columbian Exchange, which led to the cultivation of multiple varieties across the world for food and traditional medicine. Five Capsicum species have been widely cultivated: capsicum annuum, baccatum, chinense, frutescens, and pubescens.
Peru has the highest diversity of cultivated Capsicum; it is a center of diversification where varieties of all five domesticates were introduced, grown, and consumed in pre-Columbian times. The largest diversity of wild Capsicum peppers is consumed in Bolivia. Bolivian consumers distinguish two basic forms: ulupicas, species with small round fruits including C. eximium, C. cardenasii, C. eshbaughii, and C. caballeroi landraces; and arivivis with small elongated fruits including C. baccatum var. baccatum and C. chacoense varieties.
Ideal growing conditions for peppers include a sunny position with warm, soil, ideally , that is moist but not waterlogged. The seeds germinate only when warm, close to . The plants prefer warm conditions, but can tolerate temperatures down to ; and are sensitive to cold. The flowers can Self-pollination. However, at extremely high temperatures, , pollen loses viability, and its flowers are much less likely to result in fruit. For flowering, Capsicum is a non-photoperiod-sensitive crop.
Chilies are vulnerable to pests including , glasshouse red spider mite, and glasshouse whitefly, all of which feed on plant sap. Common diseases include grey mould caused by Botrytis cinerea; this rots the tissues and produces a brownish-grey mould on the surface.
Products include whole dried chilies, chili flakes, and chili powder, Fresh or dried chilies are used to make hot sauce, a liquid condiment—usually bottled for commercial use—that adds spice to other dishes. Dried chilies are used to make chili oil, cooking oil infused with chili.
In 2020, 36 million of green chilies and peppers (counted as any Capsicum or Pimenta fruits) were produced worldwide, with China producing 46% of the total.
When peppers are consumed by mammals such as humans, capsaicin binds with nociceptor in the mouth and throat, potentially evoking pain via spinal relays to the brainstem and thalamus where heat and discomfort are perceived. However, birds are unable to perceive the hotness and so they can eat some of the hottest peppers. The intensity of the "heat" of chili peppers is commonly reported in Scoville scale (SHU), invented by American pharmacist Wilbur Scoville in 1912. Historically, it was a measure of the dilution of an amount of chili extract added to sugar syrup before its heat becomes undetectable to a panel of tasters; the more it has to be diluted to be undetectable, the more powerful the variety, and therefore the higher the rating. Since the 1980s, spice heat has been assessed quantitatively by high-performance liquid chromatography (HPLC), which measures the concentration of heat-producing capsaicinoids, typically with capsaicin content as the main measure.
Capsaicin is produced by the plant as a defense against mammalian predators. A study suggests that by protecting against attack by a bug, the risk of disease caused by a Fusarium fungus carried by the insects is reduced. As evidence, the study notes that peppers increased the quantity of capsaicin in proportion to the damage caused by fungi on the plant's seeds.
The leaves of every species of Capsicum are edible, being mildly bitter and nowhere near as hot as the fruits. They are cooked as Leaf vegetable in Filipino cuisine, where they are called dahon ng sili (literally "chili leaves"). They are used in the chicken soup tinola. In Korean cuisine, the leaves may be used in kimchi.
Conflicts between farmers and elephants have long been widespread in African and Asian countries, where elephants nightly destroy crops, raid grain houses, and sometimes kill people. Farmers have found the use of chilies effective in crop defense against elephants. Elephants do not like capsaicin due to their large and sensitive Olfaction and nasal system. The smell of chili causes them discomfort and deters them from feeding on the crops. By planting a few rows of the fruit around valuable crops, farmers create a buffer zone through which the elephants are reluctant to pass. Chili dung bombs are also used for this purpose. They are bricks made of mixing dung and chili, and are burned, creating a noxious smoke that keeps hungry elephants out of farmers' fields. This can lessen dangerous physical confrontation between people and elephants.
Birds do not have the same sensitivity to capsaicin as mammals, as they lack a specific Nociceptors. Chili peppers are eaten by birds living in the chili peppers' natural range, possibly contributing to seed dispersal and evolution of the protective capsaicin in chili peppers, as a bird in flight can spread the seeds further away from the parent plant after they pass through its digestive system than any land or tree dwelling mammal could do so under the same circumstances, thus reducing competition for resources.
The three primary spellings are chili, chile and chilli, all recognized by dictionaries.
Unscrupulous traders have illegally added at least eight different synthetic dyes, including Auramine O, Chrysoidine, Sudan stain, Para red, and Rhodamine B to chili products. All these chemicals are harmful. They can be detected by liquid chromatography used together with mass spectrometry.
Distribution to Europe
When Christopher Columbus and his crew reached the Caribbean, they were the first Europeans to encounter Capsicum fruits. They called them "peppers" because, like black pepper ( Piper nigrum), which had long been known in Europe, they have a hot spicy taste unlike other foods. Chilies were first brought back to Europe by the Spanish, who financed Columbus's voyages, at the start of the large-scale interchange of plants and culture between the New World and the Old World called the Columbian exchange. Chilies appear in Spanish records by 1493. Unlike Piper vines, which grow naturally only in the tropics, chilies could be grown in temperate climates. By the mid-1500s, they had become a common garden plant in Spain and were incorporated into numerous dishes. By 1526, they had appeared in Italy, in 1543 in Germany, and by 1569 in the Balkans, where they came to be processed into paprika. (2025). 9781351440622, CRC Press. ISBN 9781351440622
Distribution to the rest of the world
The rapid introduction of chilies to Africa and Asia was likely through Portuguese and Spanish Empire in the 16th century, though the details are unrecorded. The Portuguese introduced them first to Africa and Arabia, and then to their colonies and trading posts in Asia, including Goa, Sri Lanka, and Malacca. From there, chilies spread to neighboring regions in South Asia and western Southeast Asia via local trade and natural dispersal. Around the same time, the Spanish also introduced chilies to the Philippines, where they spread to Melanesia, Micronesia, and other Pacific Islands via their monopoly of the Manila galleons. Their spread to East Asia in the late 16th century is less clear, but was likely also through local trade or through Portuguese and Spanish trading ports in Canton, China, and Nagasaki, Japan. (2025). 9780826361806, University of New Mexico Press. ISBN 9780826361806 The earliest known mention of the chili pepper in Chinese writing dates to 1591, though the pepper is thought to have entered the country in the 1570s.
Producing chili peppers
Cultivation
Chili peppers are the shiny, brightly coloured fruits of species of Capsicum. Botanically they are berries. The plants are small, depending on variety, making them suitable for growing in pots, , or commercially in . The plants are perennial, provided they are protected from cold. The fruits can be green, orange, red, or purple, and vary in shape from round and knobbly to smooth and elongated. If the fruits are picked green and unripe, more flowers develop, yielding more fruit; fruits left on the plant can become hotter in taste, and acquire their ripe coloration, at the price of a reduced harvest.
(2025). 9781466507876, Taylor & Francis. ISBN 9781466507876
Preparation
Harvested chilies may be used fresh, or dried, typically on the ground in hot countries, to make a variety of products. Drying enables chilies grown in temperate regions to be used in winter. For home use, chilies can be dried by threading them with cotton and hanging them up in a warm dry place to dry.
Annual production
+Production of chillies and peppers, green – 2020 Source: FAOSTAT of the United Nations
Species and cultivars
Species of Capsicum that produce chili peppers are shown on the simplified phylogenetic tree, with examples of cultivars: The World Vegetable Center has one of the largest collection of chili peppers in the world. It has researched climate change resistant cultivars.
United States
File:HotPeppersinMarket.jpg|Scotch bonnets,
Caribbean
File:Phrik haeng.jpg|Bird's eye chilies,
Thailand
File:청양고추3.jpg|Cheongyang peppers,
South Korea
Spain
File:Chili peppers cultivated in Myanmar.jpg|Purple chilies,
Myanmar
Intensity
Capsaicin
The substances that give chili peppers their pungency (spicy heat) when ingested or applied topically are capsaicin (8-methyl- N-vanillyl-6-nonenamide) and several related chemicals, collectively called capsaicinoids. Chem. Abstr. 1964, 60, 9827g. Pure capsaicin is a hydrophobic, colorless, odorless, and crystalline-to-waxy solid at room temperature. The quantity of capsaicin varies by variety, and depends on growing conditions. Water-stressed peppers usually produce stronger fruits. When a habanero plant is stressed, for example by shortage of water, the concentration of capsaicin increases in some parts of the fruit.
Intensity range of commonly used cultivars
A wide range of intensity is found in commonly used peppers:
0 SHU 3,500–10,000 SHU 30,000–50,000 SHU 50,000–100,000 SHU 100,000–350,000 SHU
Hottest by country
The top 8 world's hottest chili peppers (by country) are:
2.69M 2.48M 2.2M 2.0M 1.58M 1.46M 1.38M 1.3M 1.07M
As food
Nutritional value
Red hot chili peppers are 88% water, 9% , 2% protein, and 0.4% fat (table). In a 100 gram reference amount, chili peppers supply 40 , and are a rich source of vitamin C and vitamin B6. Link to USDA Database entry
Pungency
Due to their unique pungency (spicy heat), chili peppers constitute a crucial part of many cuisines around the world, particularly in Chinese (especially in Sichuanese food), Mexican, Thai, Indian, Yoruba, New Mexican cuisine and many other South American, Caribbean and East Asian cuisines. In 21st-century Asian cuisine, chili peppers are commonly used across many regions. Chili is a key ingredient in many curry, providing the desired amount of heat; mild curries may be flavoured with many other spices, and may omit chili altogether.
Cooking
Chilies with a low capsaicin content can be cooked like bell peppers, for example stuffing and roasting them. Hotter varieties need to be handled with care to avoid contact with skin or eyes; washing does not efficiently remove capsaicin from skin. Chilies can be roasted over very hot coals or grilled for a short time, as they break up if overcooked.
Regional cuisines
Chilies are present in many cuisines. In Peru, Papa a la huancaina is a dish of potatoes in a sauce of fresh cheese and aji amarillo chilies. In Thailand, kaeng tai pla fish curry is flavoured with a tai pla sauce made with garlic, shallots, galangal, kaffir lime, turmeric, fish paste, and bird's eye chilies. In Jamaica, jerk chicken is spiced with powerful habanero chilies and allspice. Goan vindaloo curry uses the extremely hot ghost pepper or bhut jolokia to create "perhaps India's hottest dish". In Bhutan, ema datshi, entirely made of chili mixed with local cheese, is the national dish. Many Mexican cuisine use chilies of different types, including the jalapeño, poblano, habanero, Serrano pepper, chipotle, ancho, pasilla, Guajillo chili, de árbol, Cascabel chili and Mulato pepper. These offer a wide range of flavours including citrus, earthy, fruity, and grassy. They are used in many dishes and the spicy mole sauce and Mexican salsa sauces. In Yoruba people cuisine, chillies are well used in many dishes including Ewa aganyin and Obe ata.
Other uses
Ornamental plants
The contrast in color and appearance makes chili plants interesting to some as a purely decorative garden plant.
Constrained risk-taking
Psychologist Paul Rozin suggests that eating ordinary chilies is an example of a "constrained risk" like riding a roller coaster, in which extreme sensations like pain and fear can be enjoyed because individuals know that these sensations are not actually harmful. This method lets people experience extreme feelings without any significant risk of bodily harm.
Topical use and health research
Capsaicin, the pungency chemical in chili peppers, is used as an analgesic in topical ointments, , and to relieve pain. A 2022 review of preliminary research indicated that regular consumption of chili peppers was associated with weak evidence for a lower risk of death from cardiovascular diseases and cancer.
Chemical irritants
Capsaicin extracted from chilies is used in and some tear gas formulations as a chemical irritant, for use as less-lethal weapons for control of unruly individuals or crowds. Such products have considerable potential for misuse, and may cause injury or death.
Etymology and spelling
The English word is with the same meaning. The name of the plant is unrelated to that of the country Chile. While pepper originally meant the genus Piper, not Capsicum, the Oxford English Dictionary and Merriam-Webster record both usages. (sense 2b of pepper)
(1990). 9780674796812, Harvard University Press. ISBN 9780674796812 and some parts of the United States.
Safety
The volatile oil in chili peppers may cause skin irritation, requiring hand washing and care when touching the eyes or any sensitive body parts. Consuming hot peppers may cause stomach pain, hyperventilation, , , and symptoms possibly requiring hospitalization. (2007). 9780071443104, McGraw-Hill. ISBN 9780071443104
In popular culture
The 16th century Spanish missionary and naturalist José de Acosta noted the supposed aphrodisiac power of chilies, but wrote that they were harmful to people's spiritual health. In the 1970s, the government of Peru forbade prison inmates to consume chilies, their explanation being that these were "not appropriate for men forced to live a limited lifestyle."
See also
Notes
External links
Categories: Agriculture In Mesoamerica, Medicinal Plants Of Central America, Medicinal Plants Of South America, Crops Originating From Ecuador, Crops Originating From Mexico, Crops Originating From Peru, Symbols Of New Mexico, Leaf Vegetables, Cuisine Of New Mexico, Cuisine Of The Southwestern United States, Crops Originating From The Americas, Indian Spices, Crops, Sri Lankan Spices, Mesoamerican Cuisine, Mexican Cuisine, Fruits Originating In North America
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