Portocala: proprietati medicinale dovedite

Coaja de portocala

Coaja portocalei contine o larga gama de potentiali compusi cu putere terapeutica. Acestia includ petina si constituentii flavonoizi precum hersperidena, naringina, polimetoxiflavonele quercetina si rutina, variati carotenoizi si un constituent major al mirosului ei specific cunoscut ca d-limonena, care compune pana la 90% din continutul de ulei al cojii, si este un compus ce si-a capatat numele de la coaja de lamaie, care contine o cantitate semnificativa din acest compus. Este listat in Codul SUA al Reglementarilor Federale ca GRAS (generally recognized as safe - recunoscut in general ca sigur), si este utilizat in mod obisnuit ca agent de aromatizare. D-limonena a fost studiata ca avand puternice proprietati anti-cancer, inclusiv impotriva melanomului metastazic [8].

Extractul integral din coaja a fost studiat ca avand o larga gama de beneficii:

Coaja de portocala prezinta proprietati anti-artritice: un studiu din 2010 a gasit ca extractul din coaja de portocala suprima in mod semnificativ artrita indusa adjuvant de vaccin intr-un model preclinic [9].

Coaja de portocala (flavonoizii) prezinta proprietati anti-cancer: un studiu din 2007 a gasit ca extractul din coaja de portocala a inhibat tumorogeneza la un model preclinic de soarece al polipozei adenomatoase si a sporit moartea programata a celulelor [i]. Doua studii suplimentare din 2007 au gasit ca extractul din coaja de portocala a prezentat proprietati impotriva cancerului la san. Primul, prin prezentarea proprietatilor chemopreventive impotriva leziunilor mamare tumorale la un model animal [10]. Cel de-al doilea, prin inhibare liniilor de celule de cancer la san in vitro [11]. In plus, un studiu din 2000 a gasit ca ingestia de flavanona este asociata in mod invers cu riscul de cancer esofagian si ar putea explica, impreuna cu vitamina C, efectul protector al fructului, in special al citricelor, asupra cancerului esofagian [12] In sfarsit, un studiu din 2005 a gasit ca respectivii carotenoizi din portocala ar putea ajuta la regresarea rezistentei multimedicamentoase.

Aroma portocalei

Mecanismele fiziologice prin care aromele ar putea avea proprietati terapeutice (aromoterapie) sunt bine stabilite. Micile molecule care cuprind aromele lucrurilor sunt capabile de a intra direct prin nari si in lobul olfactiv, dandu-le astfel putinta de a avea profunde efecte asupra structurilor adanci din creierul nostru, si ca rezultat asupra intregii noastre infrastructuri corporale si emotionale.

Mireasma portocalei reduce anxietatea, amplifica buna dispozitie: un studiu a gasit ca aroma uleiului esential de portocala reduce anxietatea, genereaza o stare mai pozitiva, si un nivel mai inalt de calm la femeile expuse la aceasta aroma intr-o sala de asteptare la dentist [13]. Aceasta descoperire a fost din nou confirmata de un studiu din 2005, in care mirosurile ambientale au redus anxietatea si au imbunatatit starea sufleteasca la pacientii asteptand tratament dentar [14

Surse pentru acest articol cuprind:

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[2] Farzad Deyhim, Kristy Garica, Erica Lopez, Julia Gonzalez, Sumiyo Ino, Michelle Garcia, Bhimanagouda S Patil. Citrus juice modulates bone strength in male senescent rat model of osteoporosis. Nutrition. 2006 May;22(5):559-63. Epub 2006 Feb 10. PMID: 16472977

[3] Christine Dalgård, Flemming Nielsen, Jason D Morrow, Henrik Enghusen-Poulsen, Torbjörn Jonung, Mogens Hørder, Moniek P M de Maat. Supplementation with orange and blackcurrant juice, but not vitamin E, improves inflammatory markers in patients with peripheral arterial disease. Br J Nutr. 2009 Jan;101(2):263-9. Epub 2008 May 28. PMID: 18507878

[4] Husam Ghanim, Chang Ling Sia, Manish Upadhyay, Mannish Upadhyay, Kelly Korzeniewski, Prabhakar Viswanathan, Sanaa Abuaysheh, Priya Mohanty, Paresh Dandona. Orange juice neutralizes the proinflammatory effect of a high-fat, high-carbohydrate meal and prevents endotoxin increase and Toll-like receptor expression. Am J Clin Nutr. 2010 Apr;91(4):940-9. Epub 2010 Mar 3. PMID: 20200256

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[8] GreenMedInfo.com, D-Limenone's Anti-Cancer Properties

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[i] Kunhua Fan, Naoto Kurihara, Sadanori Abe, Chi-Tang Ho, Geetha Ghai, Kan Yang. Chemopreventive effects of orange peel extract (OPE). I: OPE inhibits intestinal tumor growth in ApcMin/+ mice. J Med Food. 2007 Mar;10(1):11-7. PMID: 17472461

http://www.greenmedinfo.com/blog/9-evidence-based-medicinal-properties-oranges - potocala