This study assesses the effectiveness of a planned teaching program on knowledge and attitude regarding lifestyle modification for obesity prevention among women in urban areas of Vadodara City. In this study, a pre-experimental methodology was employed to assess the efficacy of a planned teaching program in enhancing women's knowledge and attitudes concerning lifestyle modifications for obesity prevention. The study's findings reveal a noteworthy enhancement in knowledge scores following the intervention. There was a significant positive shift in the results, as 10% displayed poor knowledge, 31.66% had average knowledge, and 58.33% now exhibited good knowledge, indicating an enhanced understanding of lifestyle modifications for obesity prevention among participants. This shift in knowledge distribution highlights the effectiveness of the intervention. The results determined that there was a notable rise in the average post-test score when compared to the average pre-test score for both knowledge and attitude following the implementation of the planned teaching program on lifestyle modification for obesity prevention. In the domains of knowledge and attitude, the computed 't' value surpassed the tabulated 't' value at a significance level of 0.05, indicating statistical significance. The correlation between pre-test knowledge and attitude scores was moderately positive, and a significant association was observed between pre-test knowledge and attitude scores and their socio- demographic variables.