Oxford \u00dcniversitesi\u2019nin 1,8 milyon ki\u015fiyi kapsayan geni\u015f analizine g\u00f6re, vejetaryenler be\u015f farkl\u0131 kanser t\u00fcr\u00fcnde daha d\u00fc\u015f\u00fck risk ta\u015f\u0131yor. Ancak ara\u015ft\u0131rma, baz\u0131 kanser t\u00fcrlerinde riskin artabilece\u011fini de ortaya koyuyor.
Oxford University ara\u015ft\u0131rmas\u0131 vejetaryenlik ve kanser riski \u00fczerine
Oxford University ara\u015ft\u0131rmac\u0131lar\u0131n\u0131n y\u00fcr\u00fctt\u00fc\u011f\u00fc ve 1,8 milyon ki\u015finin verilerini inceledi\u011fi \u00e7al\u0131\u015fma, \u015fimdiye kadar diyet \u00f6r\u00fcnt\u00fclerinin farkl\u0131 kanser t\u00fcrleri \u00fczerindeki etkisini bu \u00f6l\u00e7ekte say\u0131salla\u015ft\u0131ran ilk ara\u015ft\u0131rma olarak \u00f6ne \u00e7\u0131k\u0131yor. Bulgular British Journal of Cancer\u2019da yay\u0131mland\u0131.
Sonu\u00e7lara g\u00f6re vejetaryenler:\u2028\u00a0\u00a0<\/p>\n\n\n\n
\u00a0\u00a0\u2022\u00a0\u00a0\u00a0\u00a0pankreas kanserinde %21,\u2028\u00a0<\/p>\n\n\n\n
\u00a0\u00a0\u2022\u00a0\u00a0\u00a0\u00a0b\u00f6brek kanserinde %28,\u2028<\/p>\n\n\n\n
\u00a0\u00a0\u2022\u00a0\u00a0\u00a0\u00a0multipl miyelomda %31,<\/p>\n\n\n\n
\u2028\u00a0\u2022\u00a0\u00a0\u00a0\u00a0prostat kanserinde %12,\u2028\u00a0<\/p>\n\n\n\n
\u00a0\u00a0\u2022\u00a0\u00a0\u00a0\u00a0meme kanserinde %9 daha d\u00fc\u015f\u00fck risk ta\u015f\u0131yor.
\u00c7al\u0131\u015fma, \u00f6zellikle i\u015flenmi\u015f et t\u00fcketiminin azalt\u0131lmas\u0131n\u0131n koruyucu rol oynayabilece\u011fine i\u015faret ediyor.
‘Sorun sebzelerin fazlal\u0131\u011f\u0131 de\u011fil, etin kendisi olabilir\u2019
Ara\u015ft\u0131rman\u0131n yazarlar\u0131ndan epidemiyolog Tim Key\u2019e g\u00f6re, risk fark\u0131 yaln\u0131zca vejetaryenlerin daha sa\u011fl\u0131kl\u0131 ya\u015fam tarz\u0131na sahip olmas\u0131yla a\u00e7\u0131klanamayabilir. Bulgular, \u00f6zellikle i\u015flenmi\u015f etlerin (salam, sosis, jambon gibi) kanser riskini art\u0131ran biyolojik mekanizmalarla ili\u015fkili olabilece\u011fini d\u00fc\u015f\u00fcnd\u00fcr\u00fcyor.
Et pi\u015firme s\u0131ras\u0131nda olu\u015fan kimyasal bile\u015fikler ve i\u015flenmi\u015f etlerde kullan\u0131lan nitratlar, h\u00fccre DNA\u2019s\u0131nda hasara yol a\u00e7abiliyor. D\u00fcnya Sa\u011fl\u0131k \u00d6rg\u00fct\u00fc daha \u00f6nce i\u015flenmi\u015f eti \u201ckanserojen\u201d olarak s\u0131n\u0131fland\u0131rm\u0131\u015ft\u0131.
Ancak risk her kanserde azalm\u0131yor
\u00c7al\u0131\u015fma, tablonun tamamen tek y\u00f6nl\u00fc olmad\u0131\u011f\u0131n\u0131 da g\u00f6steriyor. Vejetaryenlerde en yayg\u0131n \u00f6zofagus (yemek borusu) kanseri t\u00fcr\u00fcn\u00fcn riskinin yakla\u015f\u0131k iki kat artt\u0131\u011f\u0131 saptand\u0131. Veganlarda ise ba\u011f\u0131rsak kanseri riskinin et yiyenlere k\u0131yasla daha y\u00fcksek oldu\u011fu g\u00f6r\u00fcld\u00fc.
Ara\u015ft\u0131rmac\u0131lar, bu durumu hayvansal \u00fcr\u00fcnlerde daha bol bulunan baz\u0131 besin \u00f6\u011felerinin (\u00f6zellikle kalsiyum ve B12 vitamini) d\u00fc\u015f\u00fck al\u0131m\u0131yla ili\u015fkilendiriyor. Daha \u00f6nce yap\u0131lan \u00e7al\u0131\u015fmalar, kalsiyumun ba\u011f\u0131rsak kanseri riskini azaltabilece\u011fini g\u00f6stermi\u015fti.
20 y\u0131ll\u0131k takip verileri
\u00c7al\u0131\u015fma, a\u011f\u0131rl\u0131kl\u0131 olarak Birle\u015fik Krall\u0131k ve ABD\u2019de ya\u015fayan kat\u0131l\u0131mc\u0131lar\u0131n yakla\u015f\u0131k 20 y\u0131ll\u0131k takip verilerini i\u00e7eriyor. Kat\u0131l\u0131mc\u0131lar beslenme al\u0131\u015fkanl\u0131klar\u0131na g\u00f6re grupland\u0131r\u0131ld\u0131 ve sonu\u00e7lar obezite ile alkol gibi di\u011fer risk fakt\u00f6rleri dikkate al\u0131narak analiz edildi.
Toplam 1,64 milyon et yiyen kat\u0131l\u0131mc\u0131n\u0131n ortalama g\u00fcnl\u00fck et t\u00fcketimi 50 gram civar\u0131ndayd\u0131. Bu miktar yakla\u015f\u0131k bir sosis veya iki dilim jambona denk geliyor.
Ne anlama geliyor?
Ara\u015ft\u0131rmac\u0131lar, meyve, sebze ve lif a\u011f\u0131rl\u0131kl\u0131 beslenmenin ve i\u015flenmi\u015f etten ka\u00e7\u0131nman\u0131n baz\u0131 kanser t\u00fcrleri a\u00e7\u0131s\u0131ndan koruyucu olabilece\u011fini vurguluyor. Ancak t\u00fcm kanser t\u00fcrleri i\u00e7in ayn\u0131 sonucun ge\u00e7erli olmad\u0131\u011f\u0131 a\u00e7\u0131k.
Bu nedenle \u00e7al\u0131\u015fma, \u201cvejetaryenlik kanseri \u00f6nler\u201d gibi basit bir mesajdan ziyade daha n\u00fcansl\u0131 bir tablo sunuyor: Beslenme bi\u00e7imi, farkl\u0131 kanser t\u00fcrlerini farkl\u0131 \u015fekillerde etkileyebiliyor. Mesele yaln\u0131zca eti b\u0131rakmak de\u011fil; besin \u00e7e\u015fitlili\u011fini ve mikro besin dengelerini de g\u00f6zetmek.<\/p>\n\n\n\n