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Definition: "An ergogenic aid is any substance or phenomenon that enhances performance "
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27.01.2013 |
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Cabbage can help prostate cancer survival
But what about men who already have prostate cancer? Can diet have a positive effect on this group too? Yes it can, say epidemiologists. Their studies show that a diet that is rich in fish fatty acids protects prostate cancer sufferers, as does a diet containing tomato juice and tomato puree. A high intake of egg yolks and chicken with the skin on has a negative effect. [Cancer Prev Res (Phila). 2011 Dec;4(12):2110-21.]
In the summer of 2012 the Harvard epidemiologist Erin Richman reported that cabbage has a protective effect against prostate cancer. Richman used data on 1560 men who had prostate cancer without metastases, gathered in the period 2004-2999 for the Cancer of the Prostate Strategic Urologic Research Endeavor study. Richman focused on the effect of fruit and vegetables and examined the extent to which these can delay the development of the disease. This includes inhibiting the spread of tumours, preventing tumour resistance to drugs and also the prevention of death from the disease.
Richman's study showed that fruit had no effect on the development of prostate cancer, but that vegetables did have an effect. Within this category however there was only one group that had a pronounced effect – and that was cabbage. Tomato products – which strictly speaking belong to the category 'fruit' and not 'vegetables' – had no effect.
The figure below shows that the men who ate cabbage almost every day [0.92 times per day to be precise] reduced their chance of developing prostate cancer to 0.41, compared with the men who almost never [0.06 times a day] ate cabbage.
The researchers suspect that glucosinolates are the active substances in cabbage. "Glucosinolates are hydrolyzed to form isothiocyanates and indoles, which have anti-carcinogenic effects in vitro and in vivo", they write. [Eur J Nutr. 2008 May; 47 Suppl 2:73-88.] "The isothiocyanate, sulforaphane, promotes apoptosis and cell cycle arrest in prostate cancer cells." [Carcinogenesis. 2004 Jan; 25(1): 83-90.]
"These data strengthen the rationale to investigate the phytochemicals of cruciferous vegetables in men with prostate cancer, and if confirmed, provide dietary guidance for men with prostate cancer", the researchers conclude.
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