This study examines the relationships between psychological factors, specifically mood fluctuations, short temper, and feelings of negativity, and their impact on weight gain or loss among individuals. The objective is to determine how these emotional states individually and collectively influence weight changes, focusing on understanding their predictive power. A quantitative, cross-sectional design was employed. The analysis involved correlation and multiple regression techniques to explore the relationships between the variables. Results revealed that moodiness has the strongest positive correlation with weight changes and is the most significant predictor, explaining a substantial portion of the variance. Short temper and feelings of negativity also contributed to body weight variations, though to a lesser extent. The model explained the variance in weight outcomes, highlighting the meaningful role of psychological factors in weight management. This study contributes to the growing body of research emphasizing the need to integrate mental health support in weight management programs and policy interventions, recognizing the critical role of mental well-being in influencing physical outcomes such as weight fluctuations. The findings have important implications for healthcare providers, policymakers, and wellness programs aiming to address health's psychological and physical aspects.