The science of nutrition encompasses all the physiological processes and biological interactions which occur between living organisms and the foods they consume, including the psychological, sociological and cultural factors which influence food choice, with a particular focus on the consequences for health. In practice, nutrition is concerned with the effects of dietary nutrients on growth, development, reproductive capacity, health and well-being in the population and prevention of diet-related illness in the population. Nutrition science is also closely related to development of new food products in the food industry.