Isesengura rishya ryakozwe n’abahanga mu bya siyansi bo muri Jalan Universiti muri Maleziya na Lancaster University mu Bwongereza rivuga ko ibikomoka ku giti cya Thanaka cyo mu majyepfo y’uburasirazuba bw’Aziya bishobora gutanga ubundi buryo karemano bwo kurinda izuba.
Mu kwandika mu kinyamakuru Cosmetics, abahanga mu bya siyansi bavuga ko ibikomoka ku giti byakoreshejwe mu kwita ku ruhu mu kurwanya gusaza, kurinda izuba, no kuvura ibiheri mu gihe cy'imyaka irenga 2000. Abasesenguzi banditse bati: “Imiti irinda izuba karemano yakuruye abantu benshi nk'ishobora gusimbura imiti irinda izuba ikozwe hakoreshejwe imiti ikoze mu buhanga nka oxybenzone yatera ibibazo by'ubuzima no kwangiza ibidukikije.”
Thanaka
Thanaka yerekeza ku giti gisanzwe cyo muri Aziya y'Amajyepfo y'Uburasirazuba kandi kizwi kandi nka Hesperethusa crenulata (syn. Naringi crenulata) na Limonia acidissima L.
Abasesenguzi bavuze ko muri iki gihe hari ibirango byinshi muri Maleziya, Miyanimari na Tayilande bikora ibicuruzwa bya Thanaka “by’ubwiza”, birimo Thanaka Malaysia na Bio Essence muri Maleziya, Shwe Pyi Nann na Truly Thanaka byo muri Myanmar, na Suppaporn na De Leaf byo muri Tayilande.
Bongeyeho bati: “Shwe Pyi Nann Co. Ltd. ni yo ikora kandi yohereza ibicuruzwa bya Thanaka muri Tayilande, Maleziya, Singapuru na Filipine.”
Abasesenguzi basobanuye bati: “Abarundi bisiga ifu ya Thanaka ku ruhu rwabo nk'iy'isuku y'izuba. Ariko, uduce tw'umuhondo dusigaye ku itama ntitwemerwa cyane n'ibindi bihugu uretse Miyanimari. Bityo, kugira ngo abantu benshi bahabwe isuku y'izuba karemano, ibikoresho byo kwita ku ruhu bya Thanaka nka isabune, ifu yoroheje, ifu y'ibanze, isuku yo mu maso, amavuta yo kwisiga umubiri n'isuku yo mu maso birakorwa.”
“Kugira ngo ihuze n’abaguzi n’ibyo bakeneye ku isoko, Thanaka yakozwemo amavuta yo gusukura, serumu, amavuta yo koroshya, amavuta yo kuvura ibiheri by’uruhu n’amavuta yo kongera ubuziranenge bw’uruhu. Abenshi mu bakora amavuta bongeramo ibintu bikora nka vitamine, kolajeni na aside hyaluronic kugira ngo bongere ingaruka za synergic kandi batange ubuvuzi ku ndwara zitandukanye z’uruhu.”
Ubutabire bwa Thanaka n'ibikorwa bya biyoloji
Isuzuma rikomeza risobanura ko ibikomoka ku bimera byateguwe kandi bigashyirwa mu byiciro bitandukanye by’ibimera, harimo igishishwa cy’igiti, amababi, n’imbuto, hamwe na alkaloids, flavonoids, flavanones, tannins, na coumarin ari bimwe mu bintu bitera ingaruka mbi ku binyabuzima.
“… abanditsi benshi bakoresheje imiti ihumanya ikirere nka hexane, chloroform, ethyl acetate, ethanol na methanol,” babivuze. “Bityo rero, gukoresha imiti ihumanya ikirere (nka glycerol) mu gukuramo ibintu bikora ku mubiri bishobora kuba uburyo bwiza bwo gusimbura imiti ihumanya ikirere mu gukuramo ibintu karemano, cyane cyane mu guteza imbere ibikoresho byo kwita ku ruhu.”
Inyandiko zigaragaza ko ibinyabutabire bitandukanye bya Thanaka bishobora gutanga inyungu zitandukanye ku buzima, harimo kurwanya antioxidant, kurwanya gusaza, kurwanya ububyimbirwe, kurwanya melanogen na mikorobe.
Abasesenguzi bavuze ko mu guhuza siyansi kugira ngo bayisuzume, bizeye ko ibi "bizaba inkingi yo guteza imbere ibikoresho byo kwita ku ruhu birimo Thanaka, cyane cyane amavuta yo kwisiga akingira izuba."
Igihe cyo kohereza: Kanama-19-2021