şükela:  tümü | bugün
  • domates, karpuz, greyfurt, kusburnu, guavada bolca bulunan, antioksidan karotenoiddir.
    kadinlarda kalp hastaliklarini, erkeklerde prostat kanserini engelleyici etkileri oldugu bilinir.
  • sürekli alındığında prostat kanserini önleyebileceği öne sürülen madde. cerrahpaşa tıp fakültesinden tuncay altuğ tavşanlarla prostat kanseri üzerine deneyler yapmış. hoca, bir grup tavşanı domatesle beslemiş. diğerlerini de normal. ardından tüm tavşanlara prostat kanseri mikrobu aşılamış. 6 ay sonra bakmış ki, normal beslenenlerin hepsi kanser olmuş.
    domates yiyenlerin yüzde 40'ı kansere yakalanmamış. doktorlar günde 2 domatesin prostat kanserini engelleyebileceğini söylüyor.
  • likopen (lycopen); sebze ve meyvelerde dogal olarak bulunan karoten (carotenoid) ailesine ait bir pigmenttir
    (hayvan ve bitki dokularina renk veren madde). insan vucudu likopen uretemez.
    likopen karpuz ve kirmizi greyfurtta da bulunur.
    ancak likopen' in %85’ i domates ve domates urunlerinde bulunmaktadir.
    domatese ek olarak domates urunleri de likopen acisindan zengindir.
  • likopen cilt yaşlanmasına karşı sağlam bir antioksidan destektir. hatta bilmemne gölü kıyısındaki domates yetiştiricisi macar kadınlar bu domatesleri ellerine yüzlerine sürerek ve kremler yaparak ileriki yaşlarda bile genç görünmeyi başararak bulundukları köyde sansasyon yaratmışlardır:)
    yöntem hemen tavsiye edildiği gibi biraz pişmiş domatesle tarafımdan denenmiş ve sonuç olarak ciltte kırmızımsı bir bronzlaşmadan başka gözle görülür bir etkisi olmamıştır.
  • domateste bulunan, et yemeği yanında özellikle domatesin çiğ yenmesi halinde ette bulunan zararlı omega 6'ları yararlı hale getiren bir oksidan....
  • an itibari ile prostat kanserini önlediği iddaları yalan olmuş maddedir. duyduk duymadık demeyin, cünkü bunun muhabbetini basın son bir senedir cok fena sündürdü. bizde ne güzel oh verdik kendimizi domatese salçaya erkenden , inşallah ihtimali düsürecez diye seviniyorduk (bizde biraz ırside maalesef).

    muhabiriniz virginkiller national prostate cancer coalitiondan bildiriyor:

    tomatoes fail as prostate cancer preventive
    reuters health | 05.18.2007
    new york - a new study suggests that eating lycopene-rich tomatoes offers no protection against prostate cancer, contrary to the findings of some past studies. in fact, the researchers found an association between beta carotene, an antioxidant related to lycopene, and an increased risk of aggressive prostate cancer.

    in a written statement, dr. ulrike peters of the fred hutchinson cancer research center in seattle said the finding is "disappointing, since lycopene might have offered a simple and inexpensive way to lower prostate cancer risk for men concerned about this common disease. unfortunately, this easy answer just does not work."

    it's thought that antioxidants may help shield against cancer and heart disease by neutralizing harmful molecules known as oxygen free radicals. but studies to date on the role of lycopene in prostate cancer have been mixed; some suggest a protective effect, while others yield contradictory or inconclusive results.

    the current study involved 28,243 men between the ages of 55 and 74 with no history of prostate cancer who were enrolled in the prostate, lung, colorectal, and ovarian (plco) cancer screening trial. as part of the trial, the men provided a blood sample and completed a questionnaire related to their health, diet and lifestyle.

    during follow-up of up to 8 years, 692 men developed prostate cancer, and were matched to 844 men who were free of prostate cancer.

    data analysis failed to show any significant difference in blood lycopene levels between men who developed the disease and those who did not. "our results do not offer support for the benefits of lycopene against prostate cancer," peters said.

    the study, published in the current issue of cancer epidemiology, biomarkers & prevention, is one of the largest to evaluate the role of blood levels of lycopene and similar antioxidants in preventing prostate cancer.

    unexpectedly, the investigators noted an association between an increased risk of aggressive prostate cancer -- defined as disease that has spread beyond the prostate -- and higher intake of beta carotene, another antioxidant found in many vegetables and commonly used as a dietary supplement.

    although this observation "may be due to chance," peters added, "beta carotene is already known to increase the risk of lung cancer and cardiovascular disease in smokers."

    "while it would be counter-productive to advise people against eating carrots and leafy vegetables, i would say to be cautious about taking beta carotene supplements, particularly at high doses, and consult a physician," peters said.

    funding for this study was provided through the national cancer institute and the u.s. department of health and human services.

    source: cancer epidemiology, biomarkers and prevention, may 2007.
    copyright 2007 reuters health

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    aha bu da bir başkası, üsttekine inanmıyorsanız eger:

    tomatoes don't prevent prostate cancer
    study shows that lycopene doesn't cut risk of prostate cancer

    by salynn boyles | webmd | 05.17.2007
    the news that tomatoes could prevent prostate cancer sounded too good to be true, and apparently it was.

    lycopene, found mainly in tomatoes and tomato products, had little impact on prostate cancer risk in a new study from the national cancer institute and seattle's fred hutchinson cancer research center.

    early research suggesting a protective role for lycopene spurred great commercial and public interest in the antioxidant in the late 1990s.

    but subsequent studies have been either contradictory or inconclusive, fred hutchinson assistant professor and researcher ulrike peters, phd, mph, tells webmd.

    the new research, led by peters, is one of the largest and most rigorously designed trials ever to examine the issue. and the lycopene findings were unequivocal.

    "it would be great if it were true. [eating tomatoes and tomato products] would be a cheap and easy way to lower prostate cancer risk, and it would be a great public health message," peters says. "unfortunately, it's not that easy."

    colorful nutrients

    just as the similar nutrient beta-carotene makes carrots orange, lycopene is responsible for the bright red color of tomatoes. the two compounds are among the pigments synthesized by plants and are known as carotenoids.

    the latest study involved 28,000 men between the ages of 55 and 74 participating in a larger, nationwide cancer screening trial. blood samples were taken from all study participants at enrollment, and blood levels of lycopene, beta-carotene, and other carotenoids were measured.

    the men also completed questionnaires assessing their diet, lifestyle, and overall health.

    during up to eight years of follow-up, 1,320 cases of prostate cancer were diagnosed among the men in the study.

    there was no significant difference in blood lycopene levels among the men who developed prostate cancer during the follow-up and those who did not.

    however, beta-carotene was associated with an increased risk of aggressive prostate cancer.

    the researchers found that men with the highest blood beta-carotene levels had a much higher risk of developing aggressive prostate cancers.

    peters calls the finding surprising.

    "we are not sure if this was a real effect, or one that was due to chance," she says. "we do know [from other studies] that very high doses of beta-carotene seem to increase lung cancer risk in smokers."

    the results do not support the use of lycopene, beta-carotene, or other carotenoids in prostate cancer prevention, the researchers write.

    focus on diet, not pills

    so what can be said about the influence of diet and lifestyle on prostate cancer risk? not much, says peters.

    there is growing evidence that obesity increases a man's risk for the disease and some suggestion that a healthy diet may be protective. but neither association has been proven.

    american cancer society nutritional epidemiologist marji mccullough, phd, says it is increasingly clear that cancer prevention efforts should focus more on healthy diets and less on single nutrients like lycopene and beta-carotene.

    "single nutrients don't always give you the big picture," she says. "we saw that a few years ago in the beta-carotene studies."

    researchers thought taking beta-carotene would help prevent lung cancer in smokers, but they ended up finding more cancers in the smokers who took the antioxidant supplements.

    mccullough says the message from those studies and this one is that until more is known, individual carotenoids should not be taken in high doses in supplement form.

    "i would recommend that people try to get their carotenoids and other nutrients from the foods they eat," she says. "that ensures that they are getting the nutrient in its natural form along with the other nutrients in those foods."

    sources: peters, u. cancer epidemiology biomarkers & prevention, may 2007; vol 16: pp 962-968. ulrike peters, phd, mph, assistant professor, cancer prevention program, fred hutchinson cancer research center, seattle. marji mccullough, phd, nutritional epidemiologist, american cancer society.

    copyright 2007 webmd
  • tat ketçap şisesi üzerinde kendisinden bolca ihtiva ettiğine dair ibare bulunan hede.

    (bkz: likopen deposu)
  • a vitamini turevi antioksidan madde.

    var olan ne kadar faydasi varsa genelde bu maddeyi besin yoluyla alanlarda gorulur, cok afedersiniz bok varmis gibi bu maddenin izole halini hap hap yutanlarda degil.

    http://www.mayoclinic.com/…pene/ns_patient-lycopene
    http://www.cancer.org/…ontent/eto_5_3x_lycopene.asp

    domateste bulundugu dogrudur. lakin karpuzda domatese oranla iki kat fazla bulundugu pek bilinmez nedense.
  • domateste bulunan bir madde fakat insan vücudunda kulanımının kolaylaşması ve artması için; domatesin biraz ısıtılıp, zeytinyağı ile süslenmesi gerekiyormuş. öyle.
  • markette iken farkına vardığım maddedir, en sevdiğim salça olan tat salça alacakken likopen içerir yazısını görünce acaba diyerek almaktan vazgeçmiştim, tabi sonradan yararlı bir (anti)oksidan olduğunu öğrendik ama iş işten geçmiş tamek salçaya doğru yönlenmiştik...
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