Researchers from the London School of Economics have identified happiness genes in human brain. Researchers claim that these genes are known as 5-HTT and they release ‘happy chemicals’ into the brain.

People who have high versions of 5-HTT genes are more likely to be pessimist and gloomy by nature whereas those with high version of the gens are likely to stay happy. Researchers said that the 5-HTT gene also helps nerve cells in recycling serotonin which is a brain chemical said to be linked with mood and depression.

The researchers evaluated the levels of 5-HTT gene in more than 2,500 people in the US. The researchers conducted the tests to figure out how much they are satisfied with life. The findings of the study revealed that those who had high versions of the 5-HTT gene were twice likely to be happy and satisfied with their lives as compared to those with low versions.

Behavioral Economist, Jan-Emmanuel De Neve, who conducted the research, said that many previous studies have shown that 5-HTT gene play a vital role in mental health but it is the first study which claims that these genes are linked with happiness levels.