Achieving ecologically sustainable food systems for people is one of the greatest challenges facing our world today. Biomedical scientists could provide public health service and knowledge of basic hygiene and are also placed in support of the production of sustainable, nutritious, ethical and safe food delivered with minimal waste to promote human and environmental health. Good health depends on getting enough to eat. A person who does not eat enough of the foods his body needs becomes thin and weak. Malnutrition in relation to parasitosis causes important child health problems and they are trouble in resisting infections and other illnesses. Also, disability and death from many diseases-especially diarrheas, measles, and tuberculosis-are more frequent in persons who are malnourished. Poor nutrition, with its related illnesses, is responsible for more deaths than any other problem, and is an especially great danger to young children in developing countries. The nutrient intake of developing countries in children and adolescents, therefore, appear to fall below recommended levels. Children and adolescents should be encouraged to eat more nutrients to become healthier. This improvement is notable and represents an important public healthissue.