<![CDATA[Type 2 Diabetes Mellitus is one of the non-communicable diseases that is increasingly prevalent among adolescents due to unhealthy lifestyle changes. Limited knowledge and inappropriate attitudes toward the prevention of Type 2 Diabetes Mellitus may increase adolescents' risk of developing the disease. Health education using animated videos delivered through WhatsApp Groups is considered an effective approach to improving adolescents' knowledge and attitudes. This study aimed to determine the effect of animated videos delivered through WhatsApp Groups on adolescents' knowledge and attitudes regarding the prevention of Type 2 Diabetes Mellitus at SMAN 2 Kota Bengkulu. This study used a quantitative pre-experimental design with a one-group pretest-posttest approach. A total of 59 tenth-grade students were selected through simple random sampling from a population of 433 students at SMAN 2 Kota Bengkulu. The intervention consisted of animated videos distributed through a WhatsApp Group twice over one week. Data were collected using knowledge and attitude questionnaires and analyzed using the Wilcoxon Signed Rank Test. The results showed that the mean knowledge score increased from 62.90 before the intervention to 87.68 after the intervention, while the mean attitude score increased from 40.05 to 51.81. The Wilcoxon Signed Rank Test yielded a p-value of <0.001, indicating that animated videos delivered through WhatsApp Groups significantly improved adolescents' knowledge and attitudes regarding the prevention of Type 2 Diabetes Mellitus at SMAN 2 Kota Bengkulu. Schools are encouraged to utilize animated videos through WhatsApp Groups as a sustainable health promotion strategy to improve adolescents' knowledge and foster positive attitudes toward the prevention of Type 2 Diabetes Mellitus.]]>
