Year of Birth’s Impact on Obesity

We all want to feel good and beautiful—and skincare is part of that effort.  In my past posts, I have discussed the relationship between the skincare and exercise as well as the skincare and obesity.  Obesity and its cause have always been a personal interest of mine.

A recent article from Science Daily (Dec. 19, 2014) reports that a person’s year of birth impacts the person’s chance of being obese.  Fat mass and obesity-associated protein also known as alpha-ketoglutarate-dependent dioxygenase FTO is an enzyme that in humans is encoded by the FTO gene located on chromosome 16.   In a recent published article on the journal PNAS, a multi-institutional research team reports that a variant of FTO gene that previous research has linked to obesity risk largely depends on birth year.  No correlation between gene variant and obesity in study participants born in earlier years has been observed.  In comparison, a far stronger correlation than previously reported has been observed for those born in later years.

The research team analyzed data from participants in the Framingham Offspring Study -- which follows the children of participants in the original study -- gathered between 1971, when participants ranged in age from 27 to 63, and 2008.  The authors found that the correlation between the best known obesity-associated gene variant and body mass index increased significantly as the year of birth of participants increased. 

Looking at the relationships between participants' body mass index (BMI), as measured eight times during the study period, the FTO variants the study participants had inherited and when they were born revealed that the previously reported association between a specific FTO variant and BMI was seen, on average, only in participants born in later years.  While there was no correlation between the obesity-risk variant and BMI for those born before 1942, in participants born after 1942 the correlation was twice as strong as reported in previous studies.

So the message is that—for pretty much all of us, we are doomed to be obese—therefore, we all need to work extra hard to stay fit and healthy.

PNAS Journal Reference: James Niels Rosenquist, Steven F. Lehrer, A. James O’malley, Alan M. Zaslavsky, Jordan W. Smoller, and Nicholas A. Christakis. Cohort of birth modifies the association between FTO genotype and BMI. PNAS, December 2014 DOI: 10.1073/pnas.1411893111

Thanks for reading.

Connie

Connie@cherruby.com

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