This book is dedicated to matter, mattering, and transmattering. Matter, understood as a biological substance, meaning, and importance, is the main protagonist of my narrative. It is crucial that I am the matter to transmatter in and through my research—my body and its elements, my social and cognitive position, my ideas and entanglements. I asked myself several questions: How can I use myself as research matter? What can I discover while transmattering myself? What kind of story can be plotted by the matter of my body? This is a self-reflective analysis of a series of experiments that I have done to answer these questions.