3What is Nutrition? Nutrition: 1)the science or study of food and the ways in which the body uses food.2) It is also the study of how and why we make food choices.3) study of nutrients that food contains.Nutrients: substances in food that provide energy for life and growth.
4Six Classes of Nutrients There are 6 classes of nutrients in food:Carbohydrates- sugars, starches, fiberFats- main form of energy stored in bodyProteins- made of amino acids needed to build and repair body structures.Vitamins- fat soluble and water solubleMineralsWater
5Balanced Diet Keeps you Healthy -Consuming too many carbs, fats or proteins causes your body to store the extra as body fat.Excess body fat increases risk of obesity which can cause heart disease, high blood pressure, and other chronic diseases.Healthy eating when you are young can prevent problems when you are older.
6Food Has Fuel for Your Body -Food provides fuel that runs your bodyMetabolism : the sum of all the processes in your body that keep you alive and active. This requires energy and nutrients.The nutrients in food that provide this energy are carbs, fats, proteins.Vitamins, minerals and water are needed but do not provide energy.The energy in food is measured in Calories and *depends on how the amount of each nutrient that the food contains.*
7How Much Energy? Total # of calories = # of grams x calories/gram Carbs: ___ cal/ per gramProteins: ___ cal/gramHow Much Energy? Measured in Calories (cal)30 grams of steak?cal?40 grams of ice cream?________ calFats: ___ cal/gram