Diet plays a critical role in shaping the health and well-being of both individuals and populations safe diets help to protect against malnutrition in all its forms as well as noncommunicable diseases (NCDs) The balance between the amount of foods coming from animals (animal-source foods) and from plants (plant-source foods) is an important component of healthy diets Animal-source foods are a good source of highly bioavailable protein and key vitamins and minerals but consumption of certain types and at certain levels has been linked to increased risk of diet-related NCDs Consumption of plant-source foods has been linked to decreased risk of diet-related NCDs but diets consisting almost exclusively of plant-source foods may increase risk of nutrient deficiencies A growing body of evidence also suggests that the food systems used to produce animal- and plant-source foods can impact the environment in different and significant ways including the emission of greenhouse gases and water and land use parasites or chemical substances causes significant illness and death globally and both animal- and plant-source foods can be major sources of these contaminants WHO supports Member States in their efforts to promote healthier safer and more sustainable diets as a priority through a variety of actions including the recent release of several relevant guidelines on macronutrient intake and policy actions activities promoting healthy diets in schools and provision of scientific advice to the Codex Alimentarius through joint FAO/WHO programs such as the Joint Expert Committee on Food Additives (JECFA) and Joint Expert Meetings on Microbiological Risk Assessment (JEMRA) and to provide much-needed global guidance on optimal intakes of animal-source foods WHO has brought together experts from all over the world with a wide range of relevant expertise to develop: guideline development will be carried out by the WHO guideline development group (GDG) and development of the comprehensive implementation framework by the risk-benefit assessment group (RBAG) These groups will have their first joint meeting São Félix da Marinha This hybrid meeting will provide an opportunity for the experts to get to know one another familiarize themselves with various WHO processes and review and discuss current evidence with an overall focus on laying the groundwork for the development of the guideline and implementation framework Specific objectives and expected outputs are described below Attendance at this meeting is reserved for members of the expert group Risk-Benefit Assessment Expert Group - summary and conclusions Guideline Development Group on optimal intake of animal-source foods