Oxytocin is a naturally occurring peptide hormone synthesised in the hypothalamus and
released through the posterior pituitary. It has important physiological roles in reproduction
and lactation but also functions as a neuromodulator involved in social cognition,
emotional processing, attachment and interpersonal behaviour.
For this reason, oxytocin is sometimes referred to as the “bonding hormone”, although its
neurological effects are considerably more complex and depend on the individual and the
social context.
Intranasal oxytocin has become one of the most extensively studied approaches in social
neuroscience. Research demonstrates that intranasal administration can influence neural
circuits involved in social and emotional processing, including the amygdala and broader
limbic networks. Evidence supports both nose-to-brain and peripheral mechanisms, and
the relative contribution of each pathway remains under investigation.
Research has explored intranasal oxytocin in relation to social cognition, emotional
recognition, anxiety, trust, interpersonal interaction and behavioural regulation. Effects are
context-dependent and can differ significantly between individuals.