Turmeric/ja: Difference between revisions

'''ターメリック'''（{{IPAc-en|ˈ|t|ɜːr|m|ər|ɪ|k|,_|ˈ|tj|uː|-}}、学名：'''''Curcuma longa'''''（{{IPAc-en|ˈ|k|ɜːr|k|j|ʊ|m|ə|_|ˈ|l|ɒ|ŋ|ɡ|ə}}））は、[[ginger/ja|ショウガ]]科[[Zingiberaceae/ja|ショウガ(Zingiberaceae)科]]の[[flowering plant/ja|顕花植物]]である。[[:en:Indian subcontinent|インド亜大陸]]および[[:en:Southeast Asia|東南アジア]]原産の[[perennial/ja|多年生]]の[[rhizomatous/ja|根茎性]][[herbaceous plant/ja|草本植物]]で、生育には{{cvt|20|から|30|C}}の気温と高い[[:en:Annual rainfall in india|年間降水量]]を必要とします。毎年[[rhizome/ja|根茎]]を収穫し、一部は翌シーズンの繁殖用、一部は食用または[[:en:dye|染色]]用に用いられる。

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===Traditional uses===

[[File:Khandoba temple Pune.jpg|thumb|[[Khandoba]]'s newer temple in [[Jejuri]], where devotees shower turmeric powder (''bhandara'') on each other]]

In 2019, the [[European Medicines Agency]] concluded that turmeric herbal teas, or other forms taken by mouth, on the basis of their long-standing traditional use, could be used to relieve mild digestive problems, such as feelings of fullness and [[flatulence]].

Turmeric grows wild in the forests of South and Southeast Asia, where it is collected for use in classical Indian medicine (Siddha or Ayurveda). In Eastern India, the plant is used as one of the nine components of {{Transliteration|sa|nabapatrika}} along with young [[plantain (cooking)|plantain]] or banana plant, [[taro]] leaves, [[barley]] ({{Transliteration|sa|jayanti}}), [[Aegle marmelos|wood apple]] ({{Transliteration|sa|bilva}}), [[pomegranate]] ({{Transliteration|sa|darimba}}), ''[[Saraca indica]]'', {{Transliteration|sa|manaka}} (''[[Arum]]''), or {{Transliteration|sa|manakochu}}, and rice paddy. The Haldi ceremony called {{Transliteration|bn|[[gaye holud]]}} in Bengal (literally "yellow on the body") is a ceremony observed during wedding celebrations of people of Indian culture all throughout the Indian subcontinent.

In [[Tamil Nadu]] and [[Andhra Pradesh]], as a part of the Tamil–Telugu marriage ritual, a dried turmeric tuber tied with a string is used to create a [[Thali necklace]]. In western and coastal India, during weddings of the [[Marathi people|Marathi]] and [[Konkani people]], [[Kannada people|Kannada]] [[Brahmins]], turmeric tubers are tied with strings by the couple to their wrists during a ceremony, ''Kankana Bandhana''. In many Hindu communities, turmeric paste is applied to the bride and groom as part of pre-wedding festivities known as the haldi ceremony.

Turmeric makes a poor fabric [[dye]], as it is not [[Colour fastness|light fast]], but is commonly used in Indian clothing, such as [[sari]]s and [[Kasaya (clothing)|Buddhist monks' robes]]. During the late [[Edo period]] (1603–1867), turmeric was used to dilute or substitute more expensive [[safflower]] dyestuff in the production of {{Transliteration|ja|[[shibori#Beni itajime|beni itajime shibori]]}}. [[Friedrich Ratzel]] reported in ''The History of Mankind'' during 1896, that in Micronesia, turmeric powder was applied for embellishment of body, clothing, utensils, and ceremonial uses. [[Native Hawaiians]] who introduced it to [[Hawaii]] ({{langx|haw|{{okina}}ōlena}}) make a bright yellow dye out of it.

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===Indicator===

[[File:TurmericAcidBase.jpg|thumb|Turmeric dispersed in water is yellow under acid and red under alkaline conditions]]

Turmeric paper, also called curcuma paper or in German literature, ''Curcumapapier'', is paper steeped in a [[tincture]] of turmeric and allowed to dry. It is used in [[chemical analysis]] as an [[pH indicator|indicator]] for [[acidity]] and [[alkalinity]]. The paper is yellow in acidic and [[neutral solution]]s and turns brown to reddish-brown in alkaline solutions, with transition between pH of 7.4 and 9.2.

==Adulteration==

As turmeric and other spices are commonly sold by weight, the potential exists for powders of toxic, cheaper agents with a similar color to be added, such as [[lead(II,IV) oxide]] ("red lead"). These additives give turmeric an orange-red color instead of its native gold-yellow, and such conditions led the US [[Food and Drug Administration]] (FDA) to issue import alerts from 2013 to 2019 on turmeric originating in [[India]] and [[Bangladesh]]. Imported into the United States in 2014 were approximately {{convert|12|e6lb|e6kg|abbr=off|order=flip}} of turmeric, some of which was used for [[food coloring]], [[traditional medicine]], or [[dietary supplement]]. Lead detection in turmeric products led to [[product recall|recalls]] across the United States, Canada, Japan, Korea, and the United Kingdom through 2016.

[[Lead chromate]], a bright yellow chemical compound, was found as an adulterant of turmeric in Bangladesh, where turmeric is used commonly in foods and the contamination levels were up to 500 times higher than the national limit. Researchers identified a chain of sources adulterating the turmeric with lead chromate: from farmers to merchants selling low-grade turmeric roots to "polishers" who added lead chromate for yellow color enhancement, to [[wholesale]]rs for market distribution, all unaware of the potential consequences of lead toxicity.

Another common adulterant in turmeric, [[metanil yellow]] (also known as acid yellow 36), is considered by the [[Great Britain|British]] [[Food Standards Agency]] as an illegal [[dye]] for use in foods.

==Medical research==

{{see also|Curcumin|label 1=Curcumin}}

Turmeric and curcumin have been studied in numerous [[clinical trial]]s for various human diseases and conditions, with no high-quality evidence of any anti-disease effect or health benefit. There is no scientific evidence that curcumin reduces [[inflammation]], {{as of | 2020| lc=yes}}. There is weak evidence that turmeric extracts may be beneficial for relieving symptoms of knee [[osteoarthritis]], as well as for reducing pain and muscle damage following physical exercise. There is good evidence that turmeric is an allergen.

Although turmeric is of low [[bioavailability]], some supplements boost potency via a variety of preparation techniques. Turmeric supplements are hepatotoxic and have caused a recorded rise in incidence of [[herb-induced liver injury]]. In Italy, the government has banned any claims of turmeric health benefits and mandated warning for turmeric-based supplements.