Taurine is commonly sold as a dietary supplement, but there is no good clinical evidence that taurine supplements provide any benefit to human health.[6] Taurine is used as a food additive for cats (who require it as an essential nutrient), dogs, and poultry.[7]
Taurine concentrations in land plants are low or undetectable, but up to 1000 nmol/g wet weight have been found in algae.[8][9]
Chemical and biochemical features
Taurine exists as a zwitterionH3N+CH2CH2SO−3, as verified by X-ray crystallography.[10] The sulfonic acid has a low pKa[11] ensuring that it is fully ionized to the sulfonate at the pHs found in the intestinal tract.
In 1993, about 5000–6000 tonnes of taurine were produced for commercial purposes: 50% for pet food and 50% in pharmaceutical applications.[13] As of 2010, China alone has more than 40 manufacturers of taurine. Most of these enterprises employ the ethanolamine method to produce a total annual production of about 3000 tonnes.[14]
In the laboratory, taurine can be produced by alkylation of ammonia with bromoethanesulfonate salts.[15]
Taurine occurs naturally in fish and meat.[6][20][21] The mean daily intake from omnivore diets was determined to be around 58 mg (range 9–372 mg),[22] and to be low or negligible from a vegan diet.[6] Typical taurine consumption in the American diet is about 123–178 mg per day.[6]
Taurine is partially destroyed by heat in processes such as baking and boiling. This is a concern for cat food, as cats have a dietary requirement for taurine and can easily become deficient. Either raw feeding or addition of extra taurine can satisfy this requirement.[23][24]
Prematurely born infants are believed to lack the enzymes needed to convert cystathionine to cysteine, and may, therefore, become deficient in taurine. Taurine is present in breast milk, and has been added to many infant formulas, as a measure of prudence, since the early 1980s. However, this practice has never been rigorously studied, and as such it has yet to be proven to be necessary, or even beneficial.[26]
Energy drinks and dietary supplements
Taurine is an ingredient in some energy drinks in amounts of 1–3 g per serving.[6][27][28][29] A 1999 assessment of European consumption of energy drinks found that taurine intake was 40–400 mg per day.[22][clarification needed]
Research
Taurine is not regarded as an essential human dietary nutrient and has not been assigned recommended intake levels.[4] High-quality clinical studies to determine possible effects of taurine in the body or following dietary supplementation are absent from the literature.[6] Preliminary human studies on the possible effects of taurine supplementation have been inadequate due to low subject numbers, inconsistent designs, and variable doses.[6] Preliminary studies have suggested that supplementing with taurine may increase exercise capacity[30][31][32] and affects lipid profiles in individuals with diabetes.[33][34]
Safety and toxicity
According to the European Food Safety Authority (EFSA), taurine is "considered to be a skin and eye irritant and skin sensitiser, and to be hazardous if inhaled;" it may be safe to consume up to 6 grams of taurine per day.[7] Other sources indicate that taurine is safe for supplemental intake in normal healthy adults at up to 3 grams per day.[6][35]
A 2008 review found no documented reports of negative or positive health effects associated with the amount of taurine used in energy drinks, concluding, "The amounts of guarana, taurine, and ginseng found in popular energy drinks are far below the amounts expected to deliver either therapeutic benefits or adverse events".[36]
Animal dietary requirement
Cats
Cats lack the enzymatic machinery (sulfinoalanine decarboxylase) to produce taurine and must therefore acquire it from their diet.[37] A taurine deficiency in cats can lead to retinal degeneration and eventually blindness – a condition known as central retinal degeneration[38][39] as well as hair loss and tooth decay. Other effects of a diet lacking in this essential amino acid are dilated cardiomyopathy and reproductive failure in female cats.[40]
Decreased plasma taurine concentration has been demonstrated to be associated with feline dilated cardiomyopathy. Unlike CRD, the condition is reversible with supplementation.[41]
Taurine is now a requirement of the Association of American Feed Control Officials (AAFCO) and any dry or wet food product labeled approved by the AAFCO should have a minimum of 0.1% taurine in dry food and 0.2% in wet food.[42] Studies suggest the amino acid should be supplied at 10 mg per kilogram of bodyweight per day for domestic cats.[43]
Other mammals
A number of other mammals also have a requirement for taurine. While the majority of dogs can synthesize taurine, case reports have described a singular American cocker spaniel, 19 Newfoundland dogs, and a family of golden retrievers suffering from taurine deficiency treatable with supplementation. Foxes on fur farms also appear to require dietary taurine. The rhesus, cebus and cynomolgus monkeys each require taurine at least in infancy. The giant anteater also requires taurine.[44]
Birds
Taurine appears to be essential for the development of passerine birds. Many passerines seek out taurine-rich spiders to feed their young, particularly just after hatching. Researchers compared the behaviours and development of birds fed a taurine-supplemented diet to a control diet and found the juveniles fed taurine-rich diets as neonates were much larger risk takers and more adept at spatial learning tasks. Under natural conditions, each blue tit nestling receive 1 mg of taurine per day from parents.[45]
Taurine can be synthesized by chickens. Supplementation has no effect on chickens raised under adequate lab conditions, but seems to help with growth under stresses such as heat and dense housing.[46]
Fish
Species of fish, mostly carnivorous ones, show reduced growth and survival when the fish-based feed in their food is replaced with soy meal or feather meal. Taurine has been identified as the factor responsible for this phenomenon; supplementation of taurine to plant-based fish feed reverses these effects. Future aquaculture is expected to use more of these more environmentally-friendly protein sources, so supplementation would become more important.[47]
The need of taurine in fish is conditional, differing by species and growth stage. The Olive flounder, for example, has lower capacity to synthesize taurine compared to the rainbow trout. Juvenile fish are less efficient at taurine biosyntheis due to reduced cysteine sulfinate decarboxylase levels.[48]
^Irving CS, Hammer BE, Danyluk SS, Klein PD (October 1980). "13C nuclear magnetic resonance study of the complexation of calcium by taurine". Journal of Inorganic Biochemistry. 13 (2): 137–150. doi:10.1016/S0162-0134(00)80117-8. PMID7431022.
^Jacobson SG, Kemp CM, Borruat FX, Chaitin MH, Faulkner DJ (October 1987). "Rhodopsin topography and rod-mediated function in cats with the retinal degeneration of taurine deficiency". Experimental Eye Research. 45 (4): 481–490. doi:10.1016/S0014-4835(87)80059-3. PMID3428381.
^Zhang M (2003). "Role of taurine supplementation to prevent exercise-induced oxidative stress in healthy young men". Amino Acids. 26: 203–207. PMID15042451.
^Beyranvand M (2011). "Effect of taurine supplementation on exercise capacity of patients with heart failure". Journal of Cardiology. 57 (3): 333–337. doi:10.1016/j.jjcc.2011.01.007. PMID21334852.
^Silva L (2013). "Effects of taurine supplementation following eccentric exercise in young adults". Applied Physiology, Nutrition, and Metabolism. 39 (1): 101–104. doi:10.1139/apnm-2012-0229. PMID24383513.
^Franconi F (1995). "Plasma and platelet taurine are reduced in subjects with insulin-dependent diabetes mellitus: effects of taurine supplementation". The American Journal of Clinical Nutrition. 61 (5): 1115–1119. doi:10.1093/ajcn/61.5.1115. PMID7733037.
^Mizushima S (1996). "Effects of Oral Taurine Supplementation on Lipids and Sympathetic Nerve Tone". In Huxtable R (ed.). Taurine 2: Basic and Clinical Aspects (1 ed.). NY: Springer New York. pp. 615–622.
^Shao A, Hathcock JN (April 2008). "Risk assessment for the amino acids taurine, L-glutamine and L-arginine". Regulatory Toxicology and Pharmacology. 50 (3): 376–399. doi:10.1016/j.yrtph.2008.01.004. PMID18325648. the newer method described as the Observed Safe Level (OSL) or Highest Observed Intake (HOI) was utilized. The OSL risk assessments indicate that based on the available published human clinical trial data, the evidence for the absence of adverse effects is strong for taurine at supplemental intakes up to 3 g/day, glutamine at intakes up to 14 g/day and arginine at intakes up to 20 g/day, and these levels are identified as the respective OSLs for normal healthy adults.
^Clauson KA, Shields KM, McQueen CE, Persad N (2008). "Safety issues associated with commercially available energy drinks". Journal of the American Pharmacists Association. 48 (3): e55–e67. doi:10.1331/JAPhA.2008.07055. PMID18595815. S2CID207262028.
^Burger IH, Barnett KC (1982). "The taurine requirement of the adult cat". Journal of Small Animal Practice. 23 (9): 533–537. doi:10.1111/j.1748-5827.1982.tb02514.x.
^Schaffer SW, Ito T, Azuma J (January 2014). "Clinical significance of taurine". Amino Acids. 46 (1): 1–5. doi:10.1007/s00726-013-1632-8. PMID24337931. (abstracts of animal citations used to provide list of species)
BabyBaby UniversoDragon Ball Nome orig.ベビー (Bebī) Lingua orig.Giapponese EditoreShūeisha 1ª app. in Anime: episodio 22(Dragon Ball GT) Voce orig.Yusuke Numata Voce italianaLuca Sandri Caratteristiche immaginarieSpecieTsufuru mutante SessoAsessuato (assimilabile a maschile) PoteriVedi sotto Baby (ベビー Bebī?) è uno degli antagonisti principali della serie televisiva anime Dragon Ball GT. È un parassita capace di entrare nei corpi altrui e di prenderne il contr...
Історії сім'ї Мейровіцангл. The Meyerowitz Stories Жанр комедія-драмаРежисер Ной БаумбахПродюсери Ной БаумбахЕлі БушСкотт РудінЛіла ЯкобСценарист Ной БаумбахУ головних ролях Адам Сендлер Емма Томпсон Бен СтіллерДастін ГоффманОператор Роббі РаянКомпозитор Ренді НьюманКіноком...
Pour les articles homonymes, voir Mark, Marka et FIM. Mark finlandaisAncienne unité monétaire Pièce de 1 markka de 1988. Pays officiellementutilisateurs Finlande (1860-2002) Banque centrale Banque de Finlande Appellation locale markka Symbole local mk, Smk Code ISO 4217 FIM Sous-unité 100 pennis Taux de conversion 1 EUR = 5,945 73 FIM(1er janvier 1999) Chronologie Rouble impérial russe Euro (EUR) modifier Le mark finlandais (en finnois : markka, en suédois : mark) a ét...
Ця стаття є частиною Проєкту:Військова історія (рівень: невідомий) Портал «Війна»Мета проєкту — створення якісних та інформативних статей на теми, пов'язані з війною. Ви можете покращити цю статтю, відредагувавши її, а на сторінці проєкту вказано, чим ще можна допомогти. ...
Football Association of the Republic of Ireland Not to be confused with Irish Football Association, the governing body in Northern Ireland. For the full history, statistics and records of the senior team, see Republic of Ireland national football team. Football Association of IrelandUEFAFounded2 September 1921; 102 years ago (1921-09-02)FIFA affiliation1923UEFA affiliation1954PresidentGerry McAnaney[1]Websitewww.fai.ie The Football Association of Ireland (FAI; Irish:...
هذه المقالة يتيمة إذ تصل إليها مقالات أخرى قليلة جدًا. فضلًا، ساعد بإضافة وصلة إليها في مقالات متعلقة بها. (أبريل 2021) جزء من سلسلة مقالات حولالعبودية بداية التاريخ التاريخ العصور القديمة مصر القديمة الازتيك الإغريق روما القديمة العصور الوسطى في أوروبا ثرال الخولوبس قنانة ...
Palitana StatePrincely State of British India1194–1948 Coat of arms Location of Palitana in SaurashtraArea • 1921777 km2 (300 sq mi)Population • 1921 58000 HistoryHistory • Established 1194• Indian independence 1948 Succeeded by India View of the Palitana Temples in 1860 Palitana was a princely state in British India until 1948. The capital was the city of Palitana. It ceased to exist when India became independent.[citation neede...
ثورة الماليز معلومات عامة التاريخ كانون ثاني 1835 الموقع البرازيل النتيجة انتصار الحكومة وهزيمة الثورة المتحاربون إمبراطورية البرازيل المسلمين اليوروبيين القوة غير معروف، ثلاث فرق عسكرية على الأقل أكثر من 600 ثائر الخسائر 7 قتلى 80 قتيل و300 أسير تعديل مصدري - تعديل ثورة ال...
Counterintuitive result in probability A chimpanzee probably not writing Hamlet The infinite monkey theorem states that a monkey hitting keys at random on a typewriter keyboard for an infinite amount of time will almost surely type any given text, including the complete works of William Shakespeare. In fact, the monkey would almost surely type every possible finite text an infinite number of times. The theorem can be generalized to state that any sequence of events which has a non-zero probab...
2020 studio album by PentagonUniverse: The HistoryType C and digital coverStudio album by PentagonReleasedSeptember 23, 2020Recorded2017–2020GenreJ-popLanguageJapaneseLabelCubeU-CubePentagon chronology Universe: The Black Hall(2020) Universe: The History(2020) We:th(2020) Pentagon Japanese chronology Shine(2018) Universe: The History(2020) Do or Not(2021) Alternative coverType A Type B Singles from Universe: The History Dr. Bebe (Japanese Ver.)Released: September 14, 2020 Universe: ...
6th-century Syrian scholar and intellectual Evagrius ScholasticusBorn536Epiphania, Byzantine EmpireDied594OccupationScholar and intellectualNotable worksEcclesiastical History Evagrius Scholasticus (Greek: Εὐάγριος Σχολαστικός) was a Syrian scholar and intellectual living in the 6th century AD, and an aide to the patriarch Gregory of Antioch.[1] His surviving work, Ecclesiastical History (Ἐκκλησιαστικὴ Ἱστορία), comprises a six-volume collect...
1977 American horror film Dracula's DogTheatrical release posterDirected byAlbert BandWritten byFrank Ray PerilliBased onHounds of Draculaby Ken JohnsonProduced byPhilip CollinsStarring José Ferrer Michael Pataki Arlene Martel CinematographyBruce LoganEdited byHarry KeramidasMusic byAndrew BellingProductioncompanyVic ProductionsDistributed byCrown International Pictures (US)EMI Films (UK)Release dates May 8, 1977 (1977-05-08) (UK) March 29, 1978 (1978-03-29)...
Adi Da Samraj2010Lahir(1939-11-03)3 November 1939New YorkMeninggal27 November 2008(2008-11-27) (umur 69)Naitauba, Lau Islands, FijiNama lainFranklin Albert JonesPekerjaanGuru spiritual, penulis, artisDikenal atasPemrakasa AdidamAnakShawnee Free Jones Adi Da Samraj adalah seorang guru, penulis, dan Seniman spiritual Amerika yang. Adi Da adalah pendiri gerakan keagamaan baru yang dikenal sebagai Adidam. Terlahir dengan nama Franklin Albert Jones (3 November 1939 - 27 November 2008), d...
Alexei Fjodorowitsch Trjoschnikow Alexei Fjodorowitsch Trjoschnikow (russisch Алексей Фёдорович Трёшников, wiss. Transliteration Aleksej Fëdorovič Trëšnikov; * 1. Apriljul. / 14. April 1914greg. in Pawlowka, Gouvernement Simbirsk; † 18. November 1991 in Sankt Petersburg) war ein sowjetischer Polarforscher, Geograph und Ozeanologe. Inhaltsverzeichnis 1 Studium und erste Expeditionen 2 Zweiter Weltkrieg und Untersuchungen der Arktis 3 Sowjetische An...
Defunct restaurant in Portland, Oregon, U.S. Henry Thiele RestaurantRestaurant informationEstablishedApril 14, 1932 (1932-04-14)Closed1990sFood typeGerman[1][2]Street address2315 Northwest Westover RoadCityPortland, OregonCountryUnited StatesCoordinates45°31′25″N 122°41′56″W / 45.52370°N 122.69883°W / 45.52370; -122.69883Seating capacity150 Henry Thiele Restaurant, or Henry Thiele's, was a restaurant located at 2315 Northwest ...
South Africa is traditionally the leader in Africa of the automotive industry and now produces more than half a million automobiles annually of all types. While domestic development of trucks and military vehicles exists, cars built under license of foreign brands are the mainstay. Current situation South Africa Export Treemap by Product (2012) from Harvard Atlas of Economic Complexity The modern automotive industry in South Africa was launched in 1995 and has since provided a large number of...
Roman legion Legion XX redirects here. For the album, see Legion: XX. Map of the Roman empire in AD 125, under emperor Hadrian, showing the Legio XX Valeria Victrix, stationed at Deva Victrix (Chester, England), in the province of Britannia. They were stationed there from AD 88 until at least the late 3rd century. Moulded antefix roof tile showing the badge and standard of Legion XX, from Holt, Clwyd, Wales Legio XX Valeria Victrix, in English Twentieth Victorious Valeria Legion, wa...
This is a dynamic list and may never be able to satisfy particular standards for completeness. You can help by adding missing items with reliable sources. Part of a series on the History of Turkey PrehistoryPrehistory of Anatolia Palaeolithic Anatolia c. 500,000– 10,000 BC Mesolithic Anatolia c. 11,000– 9,000 BC Neolithic Anatolia c. 8,000– 5,500 BC Bronze AgeTroy 3000–700 BCHattians 2500–2000 BCAkkadian Empire 2400–2150 BCLuwians 2300–1400 BCAssyria 1950–1750 B...
Plant species cultivated for edible shoots, leaves, flowers, fruit, and seeds Cidra redirects here. Not to be confused with Cidra, Puerto Rico or cider. Cucurbita ficifolia Scientific classification Kingdom: Plantae Clade: Tracheophytes Clade: Angiosperms Clade: Eudicots Clade: Rosids Order: Cucurbitales Family: Cucurbitaceae Genus: Cucurbita Species: C. ficifolia Binomial name Cucurbita ficifoliaBouché Synonyms[1] Cucurbita melanosperma A.Braun ex Gasp. Cucurbita mexicana Damma...
Strategi Solo vs Squad di Free Fire: Cara Menang Mudah!