IntroductionPublic health is now in an epidemiological transition from communicable to non-communicable diseases. This change in disease trends continuously affects almost all parts of the world, especially developing countries. Many of these negative health consequences can be prevented if policies are implemented effectively in a timely manner. Therefore, states should be aware of these changes and respond with appropriate public health systems and policies. However, in many countries, public health response capacity is poor in making effective decisions and there is no well-established research on this process ( Allin et al., 2004 ). During the last decade, numerous tools have emerged to support decision making in public health and among them, evidence-informed decision making (EIDM) has become widely used (Ciliska et al., 2008). It is the process of integrating the best available scientific evidence into the decision-making process. Furthermore, community health issues, local context, policy preferences and available resources should be taken into account at different levels of decision-making: community, national, regional and international. Scenario and task We are the public health officers of the Ministry of Health of Yemen. 58% of children under 5 years old in Yemen have moderate and severe stunting (less than two standard deviations from the mean length for the age of the reference population). Poverty, illiteracy and bad eating practices are the main reasons for this phenomenon. Stunting in children leads to low cognitive abilities, low intelligence quotient (IQ) and, consequently, low productivity in later life. This is a vicious circle. We have been tasked with developing public health policies to reduce the prevalence… half of the document… yes, a crucial role in addressing the problem of stunting in children under 5 years of age. Effectiveness: Systematic reviews have shown numerous benefits from macro- and micronutrient supplements. For example, small for gestational age (SGA) and low birth weight can be reduced with iron-folate and calcium supplements in pregnancy. Promoting the use of iodized salt is also useful for physical and mental development and for reducing infant mortality. Furthermore, the review supported the fact that energy-balanced protein supplements for both mother and baby reduce the risk of SGA, stillbirth and low birth weight. Community-level effectiveness: Despite strong evidence of benefit, further effectiveness evaluations may be needed to guide a Yemen-specific intervention. Before implementing this strategy it is necessary to investigate the feasibility, community acceptability and cost analysis.