The aim of this study was to provide a definition for body neutrality and understand the key strategies recommended to improve body neutrality for testing in future interventions. There is minimal academic literature on body neutrality and thus this study focused on examining websites where the concept has been discussed for some time. This was achieved using a realist synthesis of websites and a common elements approach to extract the key definition elements of body neutrality, strategies to improve body neutrality, in addition to the common critiques of both the body positivity and body neutrality movements. The initial search found 175 websites, of which 107 were included in the final synthesis, and common elements analysis followed after removal of duplicates and ineligible websites. Three elements, with several sub-elements, best operationalised the definition of body neutrality. Six strategies were found for development of a body neutrality intervention. This innovative study paves the way for rigorous evaluation of body neutrality. Recommendations for future work are provided, including the use of current measures, creating a new measure, and evaluating prevention and intervention programs including Single Session Interventions (SSIs).