title: Defining and addressing the nutritional needs of populations.
abstract: OBJECTIVE
  To examine the present methods used to define nutritional needs, and to analyse the intrinsic limitations of the reductionist chemical, biological and medical approaches to assess requirements. To establish the necessity to incorporate the complexities emerging from a broader understanding of the biological sciences as well as to include environmental and social dimensions in addressing nutritional needs.
  
  
  METHODS
  Examples of the limitations of current approaches and the implications of these in defining potential solutions and policy options to address present nutritional problems are presented and discussed.
  
  
  CONCLUSIONS
  The chemical and biological sciences have provided a strong base for nutrition and have been essential in establishing nutrition as a science with public health relevance. However, these approaches are clearly insufficient to address the main challenges that confront nutrition science now in the twenty-first century. There is a pressing need to include the social, economic and human rights aspects in order to define future policies that will secure the right to safe and nutritious food for all.
authors.affiliation: Instituto de Nutricion y Tecnología de los Alimentos, University of Chile, Santiago, Chile. uauy@uchile.cl
authors.forename: Ricardo
authors.initials: R
authors.lastname: Uauy
mesh_terms: D005523:Food Supply; D005524:Food Technology; D006801:Humans; D020380:Needs Assessment; D018673:Nutrition Policy; D009747:Nutritional Physiological Phenomena; D009751:Nutritional Requirements; D009753:Nutritive Value