Darm-, Prostata und Brustkrebs
Die erhöhte Aufnahme von tierlichem Protein, Milch, Milchprodukten und Kalzium lässt den insulinähnlichen Wachstumsfaktor IGF-1 ansteigen. Ein hoher IGF-1-Level wird mit einer Vielzahl an Krebserkrankungen wie Darm-, Prostata oder Brustkrebs in Verbindung gebracht. Dagegen wurde festgestellt, dass sich der IGF-1-Level beim Konsum von Gemüse und Beta-Carotin, welches sich in orangefarbenem Obst und Gemüse sowie in dunkelgrünem Blattgemüse befindet, senkte.
Referenz: Norat T, Dossus L, Rinaldi S, et al. (2007): Diet, serum insulin-like growth factor-I and IGF-binding protein-3 in European women. In: Eur J Clin Nutr. 2007 Jan;61(1): 91-98. http://www.ncbi.nlm.nih.gov/pubmed/16900085
Prostatakrebs durch Milch und Milchprodukte
Prostatakrebs ist die häufigste Krebserkrankung bei Männern. Viele internationale Studien haben den Konsum von Milch und Milchprodukten mit Prostatakrebs in Verbindung gebracht. Die Studien zeigten, dass ein höheres Risiko von Prostatakrebs bei denjenigen Personen besteht, die am häufigsten Milchprodukte konsumieren.
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Brust-, Eierstock- und Gebärmutterkrebs durch Tierprodukte
Eine Studie aus dem Jahr 2005 untersuchte bei Frauen aus 40 Ländern den Zusammenhang zwischen Ernährung und Brust-, Eierstock- sowie Gebärmutterkrebs. Es konnte nachgewiesen werden, dass die Krebswahrscheinlichkeit mit der aufgenommenen Menge an Fleisch, Milchprodukten und Käse ansteigt. Pflanzliche Lebensmittel wie Bohnen und Getreide senkten dagegen die Wahrscheinlichkeit für die Entstehung von Krebs.
Referenz: Ganmaa D, Sato A. (2005): The possible role of female sex hormones in milk from pregnant cows in the development of breast, ovarian and corpus uteri cancers. In: Med Hypotheses. 2005; 65(6):1028-37. Epub 2005 Aug 24. http://www.ncbi.nlm.nih.gov/pubmed/16125328?dopt=Citation
Brustkrebs
Britische Forscher fanden heraus, dass ein hoher Fettanteil in der Ernährung einen starken Einfluss auf die Brustkrebsentstehung hat. Wenn nicht künstlich reduziert, haben tierliche Nahrungsmittel einen sehr hohen Fettanteil, pflanzliche Lebensmittel dagegen, bis auf wenige Ausnahmen, einen sehr geringen Fettanteil. Pflanzliche Lebensmittel, insbesondere Getreide und Hülsenfrüchte, sollen zudem vorbeugend gegen Brustkrebs wirken.
Referenz: Wiseman R. (2000): Breast cancer hypothesis: a single cause for the majority of cases. J Epidemiol Community Health 2000; 54:851-8. http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1731579/pdf/v054p00851.pdf
Darmkrebs auch durch Käse
Der World Cancer Research Fund (WCRF) und das American Institute for Cancer Research (AICR) zeigten in einer Studie auf, dass der Konsum von Käse möglicherweise das Dickdarmkrebsrisiko erhöht.
Referenz: World Cancer Research Fund (WCRF) und American Institute for Cancer Research (AICR) (2007): Food, nutrition, physical activity, and the prevention of cancer: a global perspective. 129, 139, 179