Science now shows that some people experience a mutation in their gene that makes them prone to exhibit reckless and impulsive behaviour with just a small amount of alcohol. New study shows the link between impulsivity and alcohol consumption due to underlying biological causes.

The mutation in a gene of serotonin 2B receptor has been found to significantly trigger the impulsive behaviour of a person, particularly when drunk. Researchers from the University of Helsinki in Finland have found over 100,000 people carry the mutation.

The discovery comes from the analysis of data on impulsive sufferers of alcoholism and their relatives. The study was published in the journal Translational Psychiatry.

"The results also indicate that persons with this mutation are more impulsive by nature even when sober, and they are more likely to struggle with self-control or mood disorders," said lead researcher Roope Tikkanen.

To date, scientists only learnt little about the function of the serotonin 2B receptor in humans. However, Helsinki researchers said that the receptor could potentially be associated with impulsivity, which occurs in some patients with mental health problems.

A further study on the function of serotonin 2B receptor in a larger population of patients experiencing difficulties in impulse control would significantly help develop new preventive measures, researchers said. Measures would include better control of alcohol consumption and control over behaviour through cognitive-behavioural psychotherapy or medication.

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