The claim: Men run tofu food risk (literally) shrink your brain! Says who? Now, do one of the leading or, at least, the loudest in natural health community - who will remain nameless. It is hard to find all components of the modern food chain inspired so much debate or exaggeration as soy. Critics claim, all lead by cancer to severe hormonal disorders in both men and women. On the other hand, offers to mark evidence that suggests that soy by promoter show many of the benefits of hormonal replacement therapy without the well-documented risks. Where is the truth? I maintain the best possible answer in the medical literature is found.
There is an enormous amount of data on the health effects of soy nearby. The majority of the scientific evidence is in the form of animal and in vitro experiments. Manageable and suitable to make more this topic, I decided to omit this information. Everything you read in today's column is based solely on human data.
The kernel of this controversy can be attributed to the April 2000 issue of the journal of the American College of nutrition. A report by the National Institute of aging issued examined the link between tofu consumption and brain function and size in a group of 3,734 older men. The finding was that "higher midlife tofu consumption regardless of cognitive impairment indicators and brain atrophy assigned in late life". These results generated concern of outside researchers specific methodological issues in the study noted, that may have influenced the results. This led to follow up comment that demands "prematurely, issue recommendations on the risk of being the tofu eating" and ", the results should be interpreted more carefully". (1,2,3)
Evidence that seemed to support the conclusions of the original study 2000 new developed in 2008. A group of 719 senior men and women were the topics of ' 08-study. Memory tests and food frequency questionnaires were used to evaluate a possible link between cognitive decline and soy products Tempe, tofu). Tofu with poorer cognitive performance was again linked. But Tempe, a fermented soybean food was independently related "with better memory". The researchers point out that both foods contain high levels of isoflavones or Phytoestrogens. Tempe offers but also a meaningful amount of folic acid that may be partly responsible for the known benefits. (4)
The problem I found at the same time studied this problem is that several other inquiries have come to similar conclusions. For example, a publication in October 2010 issue of the journal brain research discovered, Tempe and tofu actually improves memory in a group of seniors with an average age of 67. Older seniors, 80 years old and up, have the same benefits, but you suffer from or identifiable on the basis of soy intake follow. (5)
Three recent studies, assessment of soy supplements containing concentrated levels of isoflavones reported as positive results. One of the latest, presented in the January 2009 issue of age and ageing revealed, that seniors given 100 mg / day of soy isoflavones higher on various cognitive tests than those achieved a 6 month period received a placebo. Another publication of the same year determined that supplementation with 116 mg of soy isoflavones per day for 12 weeks led to "Advanced cognitive processes that activation are displayed based on estrogen". It is important to note that compatible results in studies reported with older and younger men. (6,7,8)
Soy isoflavones may improve the spatial working memory in healthy men
The so-called "soy brain threat" is far from a problem that is resolved in the minds of many food experts,. It is clear to me that a blanket statement about the harmful effects of soy on male brain can confidently be made at this time. It is but certainly reason for pause on regular tofu consumption in men. More research in this area is called for, to be sure. If it indeed is something neurotoxic soy Quark we need what is to identify. It seems not Phytoestrogens contained therein. So where will this leave us? Overall I think soy foods should be eaten sparingly. The fermented varieties (miso, natto, soy yogurt, Tempe) are also probably better options from view of digestion and may. Soy supplements should be used as only if it is a good reason to do so - in selected cases of hot flashes, Prostate disease, etc.. This is not only a more balanced view than most, but it is also what I recommend my own diet and my clients. (9,10,11,12,13)
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