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For more information, please see: [[Atheism and obesity]]
 
For more information, please see: [[Atheism and obesity]]
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[[Medical science]] studies indicate that excess weight impairs brain function (see also: [[Physical and mental health related problems associated with obesity|Health effects of obesity]] and [[Obesity and its negative impact on intelligence]])<ref>
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*[http://psychnews.psychiatryonline.org/newsarticle.aspx?articleid=110328 Obesity Linked to Changes In Cognitive Patterns, Psychiatric News, Joan Arehart-Treichel, Clinical and Research News, September 15, 2006]
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*[http://health.usnews.com/health-news/family-health/brain-and-behavior/articles/2009/08/25/as-waistlines-widen-brains-shrink.html As Waistlines Widen, Brains Shrink: The obese and overweight have less neurological tissue, study finds, U.S News & World Report August 25, 2009]
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*[http://www.ncbi.nlm.nih.gov/pubmed/21167850 Western diet consumption and cognitive impairment: links to hippocampal dysfunction and obesity, Physiol Behav. 2011 Apr 18;103(1):59-68. Epub 2010 Dec 16.]
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*[http://www.sciencedaily.com/releases/2010/07/100714112832.htm Obesity Harms Women's Memory and Brain Function, Study Finds, Science Daily, July 15, 2010]
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*[http://www.ncbi.nlm.nih.gov/pmc/articles/instance/2568718/ Mental health, family function and obesity in African-American women, J Natl Med Assoc. 2005 April; 97(4): 478–482.]</ref>
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According to the [[World Health Organization]]:
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{{cquote|Obesity is one of the greatest public health challenges of the 21st century. Its prevalence has tripled in many countries of the WHO European Region since the 1980s, and the numbers of those affected continue to rise at an alarming rate.<ref>[http://www.euro.who.int/en/health-topics/noncommunicable-diseases/obesity World Health Organization - Obesity in Europe]</ref>}}
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To a certain extent intelligence is heritable and the link between higher IQ individuals having fewer kids is known as dysgenic fertility.<ref>[http://www.examiner.com/article/how-the-world-s-iq-is-decline How the world's IQ is in decline July 31, 2010]</ref>
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In his paper, ''The Rise and Fall of the World's IQ'', Thomas Hally wrote:
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{{cquote|In many areas phenotypic intelligence has been increasing (the Flynn Effect) while genotypic intelligence is decreasing due to the negative association between intelligence and that which is known as ³dysgenic fertility´. Gains of as much as 7.5 IQ points in phenotypic intelligence are much greater than the 0.43 IQ points per generation in the world-wide genotypic IQ that had been estimated for the period 1950-2000. The situation in the industrially developed world appears to follow the lead of the United States and a handful of other developed nations in so far as the phenotypic IQ has been increasing at a greater rate as a result of environmental improvements.
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In [[Norway]], [[Sweden]], [[Denmark]], [[Great Britain]] and [[Australia]] phenotypic intelligence has stabilized and now is declining.<ref>[http://www.academia.edu/1203173/The_Rise_and_Fall_of_the_World_1_ ''The Rise and Fall of the World's IQ''] by Thomas Hally</ref>}}
      
=== Obesity and its negative impact on intelligence ===
 
=== Obesity and its negative impact on intelligence ===
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