logo4 Evolution is progress—                          
progress is creativity.        

Obesity Rate Levels Off

view blog view wiki view wiki view wiki

After several decades of constant growth in the past decade obesity did not grow any more among children [1] and adults [2]. Some authors would claim banning vending machines from schools and other such restrictive measures responsible [3].

I think that obesity is a polygenetic disorder, the alleles that determine the phenotype have a certain prevalence in our population. For centuries these alleles have been being kept in check by insufficient food supply. Now with a population's growing wealth there was no more external obesity control and slowly but unremittingly the phenotype of a population developed according its genotype. I'm convinced the prevalence of obesity alleles is not 100%, so we would never by any measures end up with a population of 100% obese people. On the contrary, I guess the prevalence of obesity genes is about 25% that is reached about now, so I doubt that banning vending machines from school had any measurable effect.


1. Cynthia L Ogden u. a., „Prevalence of Obesity and Trends in Body Mass Index Among US Children and Adolescents, 1999-2010“, JAMA: The Journal of the American Medical Association (Januar 17, 2012), http://www.ncbi.nlm.nih.gov/pubmed/22253364.
2. Katherine M Flegal u. a., „Prevalence of Obesity and Trends in the Distribution of Body Mass Index Among US Adults, 1999-2010“, JAMA: The Journal of the American Medical Association (Januar 20, 2012), http://www.ncbi.nlm.nih.gov/pubmed/22253363.
3. Sarah Kliff, „Why are obesity rates leveling off?“, The Washington Post - Blogs, Januar 18, 2012, http://www.washingtonpost.com/blogs/ezra-klein/post/why-are-obesity-rates-leveling-off/2012/01/17/gIQAT0GF6P_blog.html.

Tags: Genetics


(c) Mato Nagel, Weißwasser 2004-2023, Disclaimer