Introduction to Nutrition Sciences PDF

INTRODUCTION TO NUTRITION SCIENCES SHS. 113 Lec-16 PROTEIN GROUP Lecture Contents  Introduction  Recommendations  Portion sizes  Sources  Functions What foods are in the Protein Foods Group?  Meat, poultry, seafood,  Beans and peas,  Eggs,  Processed soy products,  Nut...

INTRODUCTION TO NUTRITION SCIENCES SHS. 113 Lec-16 PROTEIN GROUP Lecture Contents  Introduction  Recommendations  Portion sizes  Sources  Functions What foods are in the Protein Foods Group?  Meat, poultry, seafood,  Beans and peas,  Eggs,  Processed soy products,  Nuts, and seeds DAILY RECOMMENDATIONS How much food from the Protein Foods Group is needed daily?  ADULTS (19-50 YEARS) = 5-6 OUNCE EQUIVALENTS What counts as an ounce-equivalent in the Protein Foods Group? Selection Tips Choose lean or low-fat meat and poultry. Select some seafood (at least8oz per week)  Rich in omega-3 fatty acids,  Examples such as salmon, trout, sardines, anchovies, herring, Pacific oysters, and Atlantic and Pacific mackerel. Processed meats  Processed meats such as sausage, and luncheon or deli meats have added sodium. Check the Nutrition Facts label to help limit sodium intake.  Choose unsalted nuts and seeds to keep sodium intake low. Nutritional Benefits Meat, poultry, fish, dry beans and peas, eggs, nuts, and seeds supply many nutrients.  Protein,  B vitamins (niacin, thiamin, riboflavin, and B6),  vitamin E,  iron,  zinc, and  magnesium. Functions Proteins function as building blocks for bones, muscles, cartilage, skin, and blood.  For example, to build a bone or a tooth, cells first lay down a matrix of the protein collagen and then fill it with crystals of calcium, phosphorus, magnesium, fluoride, and other minerals.  Proteins are also needed for replacing dead or damaged cells.  Cells in the deeper skin layers synthesize new proteins to form hair and fingernails.  Muscle cells make new proteins to grow larger and stronger in response to exercise. Functions  They are also building blocks for enzymes, hormones. - Digestive enzymes - Insulin Functions  As Regulators of Fluid Balance - Edema  The protein-related causes of edema include: Excessive protein losses caused by inflammation and critical illnesses Inadequate protein synthesis caused by liver disease Inadequate dietary intake of protein Functions  As Acid-Base Regulators Denatured hemoglobin loses its capacity to carry oxygen. As Transporters  Lipoproteins  Hemoglobin Functions  As Antibodies  Proteins are one of three nutrients that provide calories Quiz  How protein regulates fluid balance? Quiz  What are the daily protein recommendations?