Nutrition is defined as essential energy and health for individuals. There is dietary requirement intake that the United States and Canada abide by based on conditions during WW1 or 1940 that is updated every five years and passed on to the public. The nutritional recommendations focus on foods and do not include medicines. There are disputes of amounts of vitamins and minerals due to geographic and economical factors. Intake guidelines now use a 50% recommendation of food value for health with gender and age considerations. Use a search engine with "nutritional needs" in search of specifications of nutrients, sources and functional health.