Oxytocin - the "love" hormone produced by the body to encourage bonding - may also help us to lie to the benefit of our group, according to new research published in the Proceedings of the National Academy of Science.
Produced in the hypothalamus region of the brain, oxytocin is a peptide of nine amino acids that functions as both a hormone and a neurotransmitter. It has been demonstrated in research as promoting bonding in couples and between mothers and babies, and is also thought to drive people's impulse to be sociable.
Generally, the higher levels of oxytocin a person has, the more empathy and trust they will have, as well as lower social anxiety and fear response.
Oxytocin can also stimulate aggression, if it is required for reasons of defense.