Environmental and Individual Influences on Adolescent Diets in an Urban Informal Settlement in Kenya: Perspectives from Adolescents and Influential Adults.

Background: Adolescents in low- and middle-income countries face increasing risks for all forms of malnutrition. In Kenya, undernutrition and micronutrient deficiencies persist alongside rising rates of overweight, obesity, and nutrition-related noncommunicable diseases, highlighting the need for contextually grounded, multilevel community-based strategies to improve adolescent diets. Objectives: This study aims to examine multilevel factors that influence dietary behaviors among adolescents living in Kibera, the largest informal settlement in Kenya, to inform the design of future community-based interventions. Methods: We conducted qualitative formative research in Kibera using focus group discussions (FGDs) with adolescent girls (8 FGDs, Results: Food insecurity and the high cost of nutritious foods were identified as the primary barriers to healthy eating. Adolescents described constrained physical food environments, including school meals that lacked diversity and nearby vendors selling inexpensive fried and sweet foods with few healthy options. Food safety concerns were raised for both school and vendor foods, although these concerns rarely influenced dietary behaviors. Although adolescents demonstrated strong nutrition knowledge and motivation to eat healthfully, economic constraints, limited affordable options, social norms, and taste preferences shaped actual food choices. Conclusions: Adolescents in Kibera expressed strong motivation and knowledge related to eating balanced diets but faced substantial barriers at the individual, social, physical, and macroenvironmental levels that limited their ability to do so. These findings highlight the importance of addressing constrained food choices when designing community-based interventions tailored to the needs of adolescents in urban informal settlements.