Olive leaf

Leaves from an olive tree in Portugal

Olive leaf is the leaf of the olive tree (Olea europaea). Although olive oil is well known for its flavor and possible health benefits, the leaf and its extracts remain under preliminary research with unknown effects on human health.

Leaf characteristics

The silvery green leaves are oblong, measuring 4–10 centimetres (1.6–3.9 inches) long and 1–3 centimetres (0.39–1.18 inches) wide. When consumed, leaves have an astringent bitter taste.[citation needed]

Chemical compounds

Olive phenolics are much more concentrated in the leaves compared with olive oil or olive fruit: 1450 mg total phenolics/100 g fresh leaf vs. 110 mg/100 g fruit and 23 mg/100 ml extra virgin olive oil.[1][2] Chemical compounds in unprocessed olive leaf are oleuropein and hydroxytyrosol, as well as polyphenols and flavonoids, including luteolin, rutin, caffeic acid, catechin and apigenin.[3] Elenolic acid is a component of olive oil and olive leaf extract. It can be considered as a marker for maturation of olives.[4] Oleuropein, together with other closely related compounds such as 10-hydroxyoleuropein, ligstroside and 10-hydroxyligstroside, are tyrosol esters of elenolic acid.[2] The phenolic composition of olive leaf extract varies according to plant variety, harvesting season and method, leaf maturity, storage conditions and extraction method.[citation needed]

Culinary uses

Olive leaves are sometimes used in deluxe Chinese cuisine. Olive leaves have been used by Gina Keatley in the creation of Matche, powdered olive leaves used on desserts and in tea.[5]

Research

Scientific evidence for the supposed health effect of using olive leaf extract to manage blood glucose levels has been deemed insufficient by the European Food Safety Authority to have any cause-and-effect relationship.[6]

References

  1. ^ Lockyer S, Rowland I, Spencer JP, Yaqoob P, Stonehouse W (2017). "Impact of phenolic-rich olive leaf extract on blood pressure, plasma lipids and inflammatory markers: a randomised controlled trial". European Journal of Nutrition. 56 (4): 1421–1432. doi:10.1007/s00394-016-1188-y. PMC 5486627. PMID 26951205.
  2. ^ a b Barbaro, B; Toietta, G; Maggio, R; Arciello, M; Tarocchi, M; Galli, A; Balsano, C (2014). "Effects of the Olive-Derived Polyphenol Oleuropein on Human Health". International Journal of Molecular Sciences. 15 (10): 18508–18524. doi:10.3390/ijms151018508. PMC 4227229. PMID 25318054.
  3. ^ Herrero, M; Temirzoda, T. N.; Segura-Carretero, A; Quirantes, R; Plaza, M; Ibañez, E (2011). "New possibilities for the valorization of olive oil by-products". Journal of Chromatography A. 1218 (42): 7511–20. doi:10.1016/j.chroma.2011.04.053. hdl:10261/51788. PMID 21600577. S2CID 20915846.
  4. ^ Esti, M; Cinquanta, L; La Notte, E (1998). "Phenolic Compounds in Different Olive Varieties". Journal of Agricultural and Food Chemistry. 46 (1): 32–35. doi:10.1021/jf970391+. PMID 10554192. Elenolic acid glucoside and hydroxytyrosol can be considered indicators of maturation for olives
  5. ^ "Sicilian Olive Leaf Tea Company Releases Matche at 'World Tea'". 22 March 2022.
  6. ^ "Scientific Opinion on the substantiation of a health claim related to olive (Olea europaea L.) leaf water extract and increase in glucose tolerance pursuant to Article 13(5) of Regulation (EC) No 1924/2006". EFSA Journal. 12 (5). 2014. doi:10.2903/j.efsa.2014.3655.

Read other articles:

Bullous impetigo

Impetigo bulosaBullous impetigoBullous impetigoInformasi umum Cacar monyet atau Impetigo bulosa adalah suatu kondisi kulit yang khas terjadi pada bayi baru lahir, dan disebabkan oleh infeksi bakteri, yang menampilkan bullae.[1]:256 Kondisi ini dapat disebabkan oleh toksin Eksfoliatif A.[2] Infeksi superfisial piogenik yang terjadi dapat dibagi menjadi dua macam; Impetigo, dan impetigo non-bulosa impetigo. Impetigo bulosa disebabkan oleh Staphylococcus aureus, yang menghasilkan...

 

Ben Kasyafani

Ben KasyafaniS.H.LahirMuhammad Ben Kasyafani4 Juli 1983 (umur 40)Jakarta, IndonesiaAlmamaterUniversitas Pelita HarapanPekerjaanPemeranpresenterVJTahun aktif2007—sekarangSuami/istri Marshanda ​ ​(m. 2011; c. 2014)​ Nesyana Ayu Nabila ​(m. 2016)​ Anak1Penghargaanlihat daftar Ben Kasyafani (lahir 4 Juli 1983) adalah pemeran dan presenter Indonesia. Kehidupan awal Ben lahir dengan nama Muhammad Ben Kasyafani...

 

Keuskupan Aosta

Keuskupan AostaDioecesis AugustanaKatolik Katedral AostaLokasiNegaraItaliaProvinsi gerejawiTorinoStatistikLuas3.262 km2 (1.259 sq mi)Populasi- Total- Katolik(per 2015)128. 612125,336 (97.5%)Paroki93Imam79 (diosesan)29 (Ordo Relijius)16 Deakon PermanenInformasiDenominasiGereja KatolikRitusRitus RomaPendirianAbad ke-5KatedralKatedral Bunda Kenaikan dan Santo Yohanes Pembaptis, AostaKepemimpinan kiniPausFransiskusUskupFranco LovignanaEmeritusGiuseppe AnfossiPet...

Angelo Mercurio

This article needs additional citations for verification. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed.Find sources: Angelo Mercurio – news · newspapers · books · scholar · JSTOR (October 2019) (Learn how and when to remove this template message) Federal Bureau of Investigation surveillance photograph of Mercurio (right), with Raymond Patriarca, Jr. (left) Angelo Sonny Mercur...

 

سعدي يوسف

سعدي يوسف معلومات شخصية الميلاد سنة 1934   البصرة  الوفاة 13 يونيو 2021 (86–87 سنة)[1]  لندن  مواطنة المملكة العراقية (1934–1958) الجمهورية العراقية (1958–1968) الجمهورية العراقية (1968–2003) العراق (2003–2021) المملكة المتحدة (2005–2021)[2]  الحياة العملية المدرسة الأم كلية الت...

 

Bonnevoie-Sud

Cet article est une ébauche concernant une localité luxembourgeoise. Vous pouvez partager vos connaissances en l’améliorant (comment ?) selon les recommandations des projets correspondants. Bonnevoie-Sud (lb) Bouneweg-Süd (de) Bonneweg-Süd Vue aérienne. Administration Pays Luxembourg Canton Luxembourg Commune Luxembourg Démographie Population 13 345 hab.[1] (31 décembre 2023) Densité 5 579 hab./km2 Géographie Coordonnées 49° 35,7′ nord, 6°&...

Laboratorium Nasional Brookhaven

Laboratorium Nasional Brookhaven (bahasa Inggris: Brookhaven National Laboratory), adalah sebuah Laboratorium Nasional Departemen Energi Amerika Serikat yang terletak di Upton, New York di Long Island, dan dibentuk pada 1947 di tempat Camp Upton, sebuah bekas pangkalan Angkatan Darat Amerika Serikat. Brookhaven dioperasikan untuk Departemen Energi Amerika Serikat oleh Brookhaven Science Associates. Lab ini mempekerjakan 3.000 ilmuwan, teknisi, dan personel pendukung, dan 4.000 penyelidik tamu...

 

Mike Wallace

American journalist (1918–2012) For other people named Mike Wallace, see Mike Wallace (disambiguation). Mike WallaceWallace in 1997BornMyron Leon Wallace(1918-05-09)May 9, 1918Brookline, Massachusetts, U.S.DiedApril 7, 2012(2012-04-07) (aged 93)New Canaan, Connecticut, U.S.EducationUniversity of Michigan (BA)OccupationsTelevision personalityradio announcerjournalistgame show hostactorYears active1939–2008Notable credit60 Minutes (1968–2008)Spouses Norma Kaphan ​ R...

 

Woodford County High School For Girls

This article needs additional citations for verification. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed.Find sources: Woodford County High School For Girls – news · newspapers · books · scholar · JSTOR (September 2008) (Learn how and when to remove this message) Grammar school in Woodford Green, London, EnglandWoodford County High School For GirlsAddressHigh RoadWoodford Gree...

Lavausseau

LavausseaucomuneLavausseau – Veduta LocalizzazioneStato Francia Regione Nuova Aquitania Dipartimento Vienne ArrondissementPoitiers CantoneVouneuil-sous-Biard TerritorioCoordinate46°33′N 0°05′E / 46.55°N 0.083333°E46.55; 0.083333 (Lavausseau)Coordinate: 46°33′N 0°05′E / 46.55°N 0.083333°E46.55; 0.083333 (Lavausseau) Superficie24,66 km² Abitanti812[1] (2009) Densità32,93 ab./km² Altre informazioniCod. postale864...

 

A Tale of Love

1986 Italian filmA Tale of LoveDirected byFrancesco MaselliWritten byFrancesco Maselli Fiore De RienzoProduced byCarlo TuziiStarringValeria GolinoCinematographyMaurizio Dell'OrcoMusic byGiovanna MariniRelease date 1986 (1986) CountryItalyLanguageItalian Storia d'amore, internationally released as A Tale of Love and Love Story, is a 1986 Italian drama film directed by Francesco Maselli.[1] It entered the 43rd Venice International Film Festival, in which it won the Special Jury Pri...

 

العيون (المدينة المنورة)

  لمعانٍ أخرى، طالع العيون (توضيح). العيون الاسم الرسمي العيون[1]  الإحداثيات 24°29′00″N 39°50′00″E / 24.4833°N 39.8333°E / 24.4833; 39.8333   تقسيم إداري  البلد السعودية[2]  التقسيم الأعلى منطقة المدينة المنورةالمنطقة الشرقية  عدد السكان  عدد السكان 33042 (2...

معركة موزاكي

معركة موزاكي معلومات عامة التاريخ 4 مايو1878م البلد اليونان  الموقع 39°25′40″N 21°38′42″E / 39.4278036°N 21.6449528°E / 39.4278036; 21.6449528   النتيجة نصر اليونان المتحاربون الدولة العثمانية * اليونان تعديل مصدري - تعديل   معركة موزاكي(بالإنجليزية: Battle of Mouzaki)‏ هي معركة وقعت في 4 م...

 

Foča

Not to be confused with Foča-Ustikolina. Town and municipality in Republika SrpskaFoča ФочаTown and municipality Coat of armsLocation of Foča within Bosnia and HerzegovinaCoordinates: 43°30′23″N 18°46′29″E / 43.50639°N 18.77472°E / 43.50639; 18.77472Country Bosnia and HerzegovinaEntity Republika SrpskaGeographical regionPodrinjeGovernment • Municipal mayorMilan Vukadinović (SNSD) • Municipality1,134.58 km2...

 

Soeryo Goeritno

Soeryo Goeritno Informasi pribadiLahir30 Januari 1943 (umur 81) Blitar, Jawa Timur, IndonesiaSuami/istriLyudmila AlexandrovnaAnakPervanovana Vtaro AndreyasSunting kotak info • L • B Soeryo Goeritno (lahir 30 Januari 1943) adalah seorang pengusaha Indonesia. Soeryo yang merupakan lulusan sebuah universitas di kota Moskow, Uni Soviet ini memang fokus pada bisnis yang melibatkan hubungan dengan negara Uni Soviet atau sekarang Rusia. Nama Soeryo Goeritno semakin banyak disebut ...

أكاديمية نيويورك للأفلام

أكاديمية نيويورك للأفلام   معلومات التأسيس 1992[1]  الموقع الجغرافي إحداثيات 40°44′11″N 73°59′20″W / 40.736478°N 73.988972°W / 40.736478; -73.988972   المدينة نيويورك  البلد الولايات المتحدة  إحصاءات عدد الطلاب 1271 (سبتمبر 2020)[2]  عدد الموظفين 878 (سبتمبر 2020)[2]  �...

 

IndiHome

IndiHomeLogo IndiHome by Telkomsel sejak 1 Juli 2023Nama sebelumnyaTelkomNet Instan (1994-2004)Speedy (2004-2015)JenisInternetTelepon rumah protokol internetTelevisi protokol internet berlanggananMotoSemua Rumah Semua Bisa (2020-2021)Aktivitas Tanpa Batas (2021-sekarang)SloganSemua Bisa Berubah Maju (2020-2021)Internetnya Indonesia (2021-sekarang)Negara IndonesiaTanggal peluncuran1994 (sebagai TelkomNet Instan)2015 (sebagai IndiHome)PemilikTelkomselInduk perusahaanTelkom IndonesiaS...

 

Medical privacy

Practice to maintain patient records privacy Medical privacy, or health privacy, is the practice of maintaining the security and confidentiality of patient records. It involves both the conversational discretion of health care providers and the security of medical records. The terms can also refer to the physical privacy of patients from other patients and providers while in a medical facility, and to modesty in medical settings. Modern concerns include the degree of disclosure to insurance c...

Associazione Calcio Perugia 1959-1960

Questa voce sull'argomento stagioni delle società calcistiche italiane è solo un abbozzo. Contribuisci a migliorarla secondo le convenzioni di Wikipedia. Segui i suggerimenti del progetto di riferimento. Voce principale: Associazione Calcistica Perugia Calcio. Associazione Calcio PerugiaStagione 1959-1960Sport calcio Squadra Perugia Allenatore Egizio Rubino Presidente Gaetano Salvi Serie C - Gir. B10º posto Maggiori presenzeCampionato: Davanzati, Mori (32) Miglior marcatoreCampi...

 

أوتريا (أين)

أوتريا   الاسم الرسمي (بالفرنسية: Outriaz)‏  الإحداثيات 46°04′02″N 5°32′49″E / 46.067222222222°N 5.5469444444444°E / 46.067222222222; 5.5469444444444 [1]  [2] تاريخ التأسيس 1 أبريل 1873  تقسيم إداري  البلد فرنسا[3]  التقسيم الأعلى آن  خصائص جغرافية  المساحة 5.91 كيلومتر مربع&...