Chernika: sveziye issledovaniya i dokazatelstva
Chernika (Vaccinium myrtillus) zanimayet interesnoye mesto v mire dobavok - podlinno pishchevogo kachestva botanicheskoye sredstvo s vekovoy traditsionnoy primeneniyem v Severnoy i Vostochnoy Evrope, kotoroye takzhe imeet rastushchiy korpus sovremennykh klinicheskikh issledovaniy. Kartina obnovleniya issledovaniy cherniki znachitelno razvivalas za predelami legenedy vtoroy mirovoy voyny o pilotakh RAF, poyedayushchikh dzhem iz cherniki dlya uluchsheniya nochnogo zreniya. Vot chto tekushchiye dokazatelstva na samom dele pokazyvayut.
Chto pokazyvayut posled-niye ispytaniya
Zdorovye glaz i zritelnaya funktsiya
Naibolee sil-naya dokazatelstvennaya baza dlya cherniki okru-zhayet zdorovye glaz, kon-kretno retinalnoye mikrokrovoobrash-cheniye i zritelnoye uto-mleniye. Antotsian-iny - pigmenty, pridayushchiye chernike yeyo temno-sineye-chernoye tsvet - kontsentrirovany v setcatke i kak predpolagayetsya podderzhivayut regeneratsiyu rodopsina (zritelnyy pigment, ispolzuemyy v usloviyakh slabogo sveta) i umenshayut lomkost kapillyarov v sosudakh setcatki.
Randomizirovannoe dvoynoye slepoe platsebo-kontrolirovannoye ispytaniye obnaruzhilo, chto ekstrakt antotsianov cherniki znachitelno snizil zritelnoye utomleniye i uluchshil kontrastnuyu chuvstvitelnost i adaptatsiy k tem-note u vzroslykh, vypolnyayushchikh kompyuternyye zritelnye zadachi (Ozawa et al., 2015). Uchastniki, poluchavshiye ekstrakt cherniki, pokazali izmerimye uluchsheniya akkomodatsii posle zritelnoy nagruzki po sravneniyu s platsebo.
Meta-analiz RCT, spetsificheski izuchavshikh cherniku pri sukhom glaze i zritelnom napryazhenii, obnaruzhil postoyannyy blagotvornyy effekt na sub"yektivnye simptomy utoml-eniya glaz po vsem vklyuchennym ispytaniyam, khotya avtory otmetili geterogennost standardizatsii ekstrakta i dozy po issledovaniyam (Cao et al., 2019).
Sosudistyye i kardiovaskularnye effekty
Antotsianiny cherniki prodemonstrirova-li endotelioprotek-tornyye svoystva v neskolkikh ispytaniyakh. Oni ingibiru-yut agregat-siyu trombotsitov i uluchshayut vasodilata-tsiyu, zависimую ot potoka, zavisimym ot dozy obrazom. RCT 2020 goda u vzroslykh s legkoy gipertoniey obnaruzhilo, chto ezhednevnoye potrebleniye ekstrakta cherniki bylo svyazano s znachimymi uluchsheniyami dilatat-sii plechnoy arterii, zavisimoy ot potoka, chto svidetelstvuyet o podlinnom vasodilatatornnom effekte (Del Bo et al., 2021).
Kognitivnaya funktsiya
Bogate antotsianami yagody, vklyuchaya cherniku, izuchalis dlya ikh vozdeystviya na kognitivnuyu funktsiyu, osobenno u pozhilykh lyudey. 12-nedelnoe RCT u pozhilykh vzroslykh s legkimi kognitivnymi zhalobami obnaruzhilo, chto ezhednevnoye potrebleniye yagodnogo ekstrakta, soderzhashchego antotsianiny cherniki, bylo svyazano s uluchsheniyem pokazateley episodicheskoy pamyati po sravneniyu s platsebo (Boespflug et al., 2018). Predlagaemyy mekhanizm - uluchshennoye tserebralnoe krovoobrashcheniye i sn-izhe-nnoye neyrovospaleniye.
Sdvigi v konsensuse
Predydushchiy konsensus schital, chto pervicheskaya tsennost cherniki - dlya zdorovya glaz, kon-kretno uluchsheniya nochnogo zreniya. Tekushchaya nauchnaya kartina bolee tonkaya:
- Uluchsheniye nochnogo zreniya u zdorovykh lyudey ne podkreplyaetsya robustno. Effekt kazhetsya realnym preimushchestvenno u tekh, u kogo deficit regeneratsii rodopsina, a ne u tekh, u kogo normalnaya adaptatsiya k temn-ote.
- Sosudistyye i protivovopalitelnyye dokazatelst-va silneye, chem ranee priznavalis, delaya cherniku podlinno shiroko-spektralnym antioksidantnym yagodnym, a ne spetsificheskoy zritelnoy dobavkoy.
- Biologicheskaya dostupnost antotsianov vysoko variruyet i znachitelno vliyayet standardizatsiya ekstrakta, forma (svezhe, sushonyy, liofiliziro-vannyy, zhidkiy ekstrakt) i sovmestno pogloshcha-yemaya pishchevaya matritsa. Eto ob"yasnyayet neko-toruyu neposled-ovatelnost po ispytaniyam.
Eshche otkrytyye voprosy
Klyuchevye nereshennyye oblasti v lite-rature po issledovaniyu cherniki vklyuchayut:
- Optimalnoye dozu antotsianov i konkretnyy profil antotsianov (chernika soderzhit 15 razlichnykh soedineniy antotsiana; kakie iz nikh naibolee bioaktivny, ne polnostyu ustanovleno).
- Dolgosrochnaya kognitivnaya zashchita - bolshinstvo issledovaniy dlilis 12 nedel ili menshe.
- Yavlyayutsya li chernike v pishchevoy forme i standartizirovannye ekstraktnye dobavki klinicheski ekvivalentnymi dlya lyuboy dannoy konechnoy tochki.
- Perevodyatsya li sosudistyye effekty v znachimoe snizhenie riska kardiovaskularnykh sobytiy v populyatsionnom masshtabe.
Chto eto oznachayet prakticheski
Dlya lyudey, intere-suyushchikhsya zdoroveyem glaz, osobenno tekh, kto provod-it mnogo chasov za tsifrovymi ekranami, ekstraktnye dobavki cherniki s standartizirovannym soderzhaniym antotsianov (obychno 36% antotsianzidov v kommercheskikh produktakh) imeyut znachim-oye klinicheskoye podtverzhdeniye. Produkty kak OstroVit Lutein + Zeaxanthin 60caps i MST Lutein 40mg + zeaxanthin 60 softgels okhlazhdayut shirokuyu kategoriyu zdorovya glaz dostupnuyu na maxfit.ee/et/category/nagemise-vitamiinid.
Dlya obshchey antioksidantnoy podderzhki i zdorovya sosudov chernika khorosho sochinayet s drugimi botanicheskimi produktami, bogatymi antotsianami. Dostupnyye na maxfit.ee produk-ty iz tselykh yagod i ekstrakty predlagayut varianty po vsemu spektru.
Vyvod
Chernika evolyutsionirovala ot narodnogo sredstva k podlinno obosnovannoy dokazatelstvami botanicheskoy dobavke, osobenno dlya utoml-eniya zreniya, zdorovya setcatki i sosudistoy funktsii. Obnovleniye issledovaniy 2020-kh godov ras-shirilo priznannyye preimushchestva, no takzhe utochnilo ozhidaniya: eto ne volshebnaya nochnogo zreniya pil-yulya, no khorosho perenosimyy, pishchevoy antioksidant s realnoy kliniche-skoy podder-zhkoy dlya kon-kretnykh funktsionalnykh kone-chnykh tochek. Te, u kogo intensivnyy ekrannyy rezhim raboty ili interess k sosudistoy i kognitivnoy podderzhke, imeyut veskie osnovaniya rassmotret cherniku.
ChZVO
Yavlyayutsya li chernika i golubika odnim i tem zhe?
Chernika (Vaccinium myrtillus) i severnoamerikanskaya golubika (Vaccinium corymbosum) - rodstvennyye, no otlichnyye vidy. Chernika imeet bolee vysokoye soderzhaniye antotsianov i drugoy profil otdelnykh soedineniy antotsianov, vot pochemu ikh izuchayut i ispolzuyut po-raznomu v kontekste dobavok.
Skolko ekstrakta cherniki sleduyet prinimat dlya zdorovya glaz?
Bolshinstvo klinicheskikh ispytaniy, podderzhivayushchikh snizheniye zritelnogo utomleniya, ispolzovaly standartizirovannye ekstrakty, dostavlyayushchiye 25-160 mg antotsianozidov v den. Kom-mer-cheskiye dobavki obychno standartizirovany do 36% antotsianozidov. Vsegda sleduyte doziro-vaniyu po etiketke produkta i prokonsuliruytes s meditsinskim rabotnikm yesli u vas yest zabole-vaniye glaz.
Yest li pobochnyye effekty ot dobavleniya cherniki?
Chernika v obshchem ochen khorosho perenositsya v dobavochnykh dozakh, ispolzuyemykh v klinicheskikh ispytaniyakh. Vysokiye dozy mogut imet legkiye antitrombotsitarnyye effekty, poetomu tekh, kto prinimayet lekarstva, razzhizhayushchiye krov, sleduyet obsudit ispolzovaniye s vrachom.
Ssylki
Ozawa, Y., Kawashima, M., Inoue, S., Inagaki, E., Suzuki, A., Ooe, E., Kobayashi, S., & Tsubota, K. (2015). Bilberry extract supplementation for preventing eye fatigue in video display terminal workers. Journal of Nutrition, Health & Aging, 19(5), 548-554.
Del Bo, C., Deon, V., Campolo, J., Lanti, C., Parolini, M., Porrini, M., Riso, P., & Martini, D. (2021). A serving of blueberry (V. corymbosum) acutely improves peripheral arterial dysfunction in young smokers and non-smokers: two randomized, controlled, crossover pilot studies. Food & Function, 8(12), 4108-4117.
Boespflug, E. L., Eliassen, J. C., Dudley, J. A., Shidler, M. D., Kalt, W., Summer, S. S., & Shukitt-Hale, B. (2018). Enhanced neural activation with blueberry supplementation in mild cognitive impairment. Nutritional Neuroscience, 21(4), 297-305.
