BACKGROUND 1.1 | The problem, condition or issue Adolescents (10 to 19 years) currently represent the largest global generation of young people in our collective history (United Nations, 2015). The regions of Africa, Asia, Latin America, and the Caribbean are the home of 1.1 billion young persons (United Nations Department of Economic and Social Affairs Population Division, 2017). In sub-Saharan Africa, people below the age of 25 make up 62% of the population, with only marginal declines predicted through 2050 (United Nations Department of Economic and Social Affairs Population Division, 2019). The working age population (25 to 64 years) in sub-Saharan Africa, Oceania, and parts of Asia, Latin America, and the Caribbean is growing faster than all other age groups (United Nations Department of Economic and Social Affairs Population Division, 2019). Ensuring the health and well-being of adolescents who will fill the ranks of the world's working age population will help to propel global economic growth and development (Patton et al., 2016). Adolescence is a period of significant physiological change that includes marked skeletal growth, increased bone mass, and fundamental neurological development (Das et al., 2017; Patton et al., 2016). Proper nutrition during adolescence is crucial for optimal growth and development and helps to prepare adolescents for adulthood. However, many adolescents face challenges in achieving optimal dietary intake, especially in low-and middle-income countries (LMICs) where the majority of adolescents reside (WHO, 2014). Iron-deficiency anemia affects 430.7 million (24%) adolescents, with 77% of adolescents living with anaemia in multiburden countries where communicable, maternal, and nutritional conditions contribute to 2,500 disability adjusted lifeyears (DALYs) or more per 100,000 adolescents (Azzopardi et al., 2019). The prevalence of anaemia is consistently higher for females than males, and is more than 50% for females in Bhutan, Yemen, India, and Burkina Faso in 2016 (Azzopardi et al., 2019). Mean BMI (body mass index) and the prevalence of obesity are also rising among children and adolescents