With new technology such as fMRI neuroscientists have started the quest of unravelling the mysteries of the brain when falling in love, such as which hormones are released and what brain areas are activated during the process. New research is also in the making on possible health benefits of falling in love. It is no longer only psychologists who investigate the emotion of love, now that it is concluded that emotions also have neural correlates. Oxytocin, vasopressin, dopamine, and their receptors, serotonin, cortisol, nerve growth factor (NGF), testosterone, follicle-stimulating hormone (FSH) and norepinephrine are chemicals released in the brain when falling in love. fMRI-studies have located the following brain areas when a person is in love: Cerebellum, nucleus caudatus, the ventral tegmental area (VTA), the orbitofrontal cortex, the prefrontal cortex, nucleus accumbens, the medial insula, hippocampus, the anterior cingulate cortex, striatum, hypothalamus and substansia nigra. The health benefits are evident in the fact that falling in love sets the body and mind in a relaxed state if the love is requited. Furthermore, that love is essential for building well functioning relations, and that research on the physiology of love may unravel new methods of preventing psychiatric diseases such as depression. At this point in time there are few studies adressing these themes, and most investigations concerning the hormones released when falling in love are done on prarie voles. In conclusion, there should be further research on hormones and brain areas activated, and possible health benefits, when falling in love.