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What is the Grouchy gene?

The Grouchy gene is a genetic variant of gene 5-HTT which is designated 5-HTTLPR. 5-HTT provides with the instructions necessary to make the serotonin transporter. People with the grouchy version have lower transporter levels.

Genetically, 5-HTTLPR variation is due to size difference in the region of the gene. There are two variants a long form and a short form or the grouchy gene. Individuals with the short form make lower levels of less active transporters. 

The grouchy gene is also associated with increased risk for a variety of psychological conditions like depression, bipolar disorder, attention deficit disorder and Alzhiemer’s disease as well as with addictive behaviours and sudden infant death syndrome.


DNA Anxiety and Depression 5-HTTLPR Test

Find out whether you carry a genetic variant that disrupts your serotonin levels.


Web apps are available to users who have taken the test.


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