The National Institutes of Health (NIH) invites applications for the R21 Exploratory/Developmental Research Grant under the funding opportunity titled "Bidirectional Influences Between Adolescent Social Media Use and Mental Health." This initiative aims to understand the complex interplay between adolescents' social media behaviors and their mental health, particularly focusing on how social media interaction can both contribute to and alleviate psychiatric symptoms. The grant encourages innovative, shorter-duration studies that assess social media usage patterns and their effects, highlighting the need for robust research methodologies. The funding aims to address increasing concerns about youth mental health in the context of social media, especially following advisories from health officials highlighting its dual role as both a risk and resilience factor. Key components include a maximum budget of $275,000 over two years, with applications due by January 28, 2025. The NIH seeks diverse and interdisciplinary research proposals that account for variables such as developmental stage and context of social media use, emphasizing the importance of rigorous approaches to studying this evolving field. The document delineates eligibility requirements, application processes, and prioritizes research that addresses disparities and ethical considerations in adolescent mental health and social media use.