Nutrient – a chemical substance that is present in food and needed by the body.
Kilocalorie (or kcalorie [kcal]) - a unit of measure used to express the fuel value of carbohydrates, fats, and protiens enough to raise the temperature of 1 kg of water 1°C.
(1 lb of body fat = 3500 kcal)
Health – a state of being more than the absence of disease;is actively engaged in moving toward the fulfillment of his/her potential