A study from the University of Virginia found the link in a long-term study.
A study coming out of the University of Vermont has revealed that there is a link between eye color and alcoholism. The suggestion is that people with blue eyes are likely to be more dependent on alcohol than those with dark brown eyes. The study, which also acknowledges that there is a connection between genetics, studied 1,263 genetic profiles to get these results. They pulled from a database that only contained genetic profiles of people diagnosed with a dependence on alcohol. For this study, the geneticists filtered the database for patients with alcohol addiction or dependence and European ancestry.
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They repeated analyzed the data and found the conclusion that European Americans with light eye colors, including blue and green and gray, had higher incidences of alcohol dependency than those with dark brown eyes, and that blue eyes were most strongly associated with the condition.
The scientists said:
"We found evidence of linkage disequilibrium between an AD-associated GABA receptor gene cluster, GABRB3/GABRG3, and eye color genes, OCA2/HERC2, as well as between AD-associated GRM5 and pigmentation-associated TYR. Our population-phenotype, network, and linkage disequilibrium analyses support association between blue eye color and AD."
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However, this finding isn't all that surprising because there has been other research into the connection between blue eyes and other health conditions. It has been found that people who were of Asian decent do not hold their liquor as well as those with European ancestry because their bodies make an atypical version of the enzyme aldehyde dehydrogenase, which metabolizes alcohol.