Nutritional epidemiology and nutritional science are two fields that share knowledge about the interactions of nutrients, food consumption, and the human body. An understanding of the principles of nutritional sciences is required to understand nutritional epidemiology. The two fields explore diet-disease relationships to provide preventative measures for the public. Research in nutritional science also provides the basis for food regulations and dietary guidelines. Knowledge from nutritional science has raised societal awareness about links between food consumption and wellbeing