Affect food choices of individual consumers. A person who has lactose intolerance will purchase dairy free products. Someone allergic to nuts will avoid purchasing foods that may contain nuts. Consumers who want to follow a healthy balanced diet and reduce their risk of dietary related disorders, such as hypertension/Cardi vascular disease may choose to purchase products that are low in salt. There are 6 basic nutrients: Carbohydrates, Proteins, Fats, Vitamins, Minerals and Water. These nutrients must be obtained from the foods you eat, your body cannot make them on it's own.