In Molecules of Emotion (1997), Candace Pert takes us on a fascinating journey through the body and mind and how the two are intertwined much more deeply than we ever thought. As a neuroscientist, Pert discovered the opioid receptor in the brain in the 1970s, which led her to a groundbreaking vision of emotions: they are not vague inner states, but concrete biochemical processes taking place throughout the entire body.

Her core idea is that emotions are driven by neuropeptides, small molecules that act as messengers between the brain and the body. These molecules (and their associated receptors) are found not only in the brain, but also in the immune system, the gut, and the heart. In other words: your entire body feels and thinks along.

Pert argues that body and mind are not two separate domains, but one integrated system. According to her, the separation traditionally maintained by Western medicine between the physical and the mental, between doctor and patient, is untenable. Molecules of Emotion is therefore more than a scientific book: it is a plea for a new, holistic approach to health, in which emotions, consciousness, and bodily processes are understood together.

The tone of the book is personal and inquisitive. Pert combines scientific explanations with stories from her own life and research. In doing so, she invites the reader to look with fresh eyes at stress, illness, healing, and especially at the power of the feeling body.