This article introduces a new paradigm in nutritional science for long-term weight management, based on the integration of bioneurofeedback and bioimpedance analysis. Bioneurofeedback, a technique that combines the monitoring of physiological parameters with the modulation of brain activity, is employed to improve the self-regulation of eating behaviors by adjusting brainwave activity and reducing stress. Bioimpedance analysis provides a precise evaluation of body com-position, enabling the personalization of interventions according to individual physiological and metabolic characteristics. This integrated approach utilizes the principles of cybernetics and complex systems theory to better understand the interaction between mind and body, enhancing weight regulation through a dual top-down and bottom-up strategy. Additionally, the article discusses how an excess or deficiency in specific brainwaves can affect disordered eating behaviors, proposing biofeedback integration as a method to mitigate the yo-yo effect and promote sus-tainable lifestyle changes.