Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Unit 2: Nutrition What is nutrition? American Culinary Federation: Culinary Fundamentals. © 2006, Pearson Education, Upper Saddle River, NJ 07458. All Rights Reserved. American Culinary Federation: Culinary Fundamentals. © 2006, Pearson Education, Upper Saddle River, NJ 07458. All Rights Reserved. • Nutrition is the study of foods • Foods are a basic requirement for life • Foods grow new cells, repair damaged ones, provide energy • Foods provide calories to keep warm • Foods provide essential nutrients • Good nutrition is part of a healthy lifestyle and healthy countenance American Culinary Federation: Culinary Fundamentals. © 2006, Pearson Education, Upper Saddle River, NJ 07458. All Rights Reserved. Guidelines for Nutrition • • • • • The USDA food guide pyramid Traditional Mediterranean pyramid Asian pyramid Latin pyramid Pyramids to illustrate special dietary requirements American Culinary Federation: Culinary Fundamentals. © 2006, Pearson Education, Upper Saddle River, NJ 07458. All Rights Reserved. USDA Food Guide Pyramid • • • • • • • Presents a plan for a healthy diet Suggests daily servings Six categories of foods Grain-based foods Fruits and vegetables Dairy foods Meats, poultry, fish, and eggs • Fats, oils, and sweets American Culinary Federation: Culinary Fundamentals. © 2006, Pearson Education, Upper Saddle River, NJ 07458. All Rights Reserved. Dietary Recommendations for Americans • • • • • • 6–11 grain based servings daily 3–5 servings of vegetables 2–4 servings of fruits 2–3 servings of dairy 2–3 servings of protein-rich foods This is revised every 5 years based on medical findings American Culinary Federation: Culinary Fundamentals. © 2006, Pearson Education, Upper Saddle River, NJ 07458. All Rights Reserved. 2005 Dietary Guidelines • • • • • • • • Aim for a healthy weight Be physically active every day Food choices should come from USDA guidelines Choose whole grains daily Choose a variety of fruits and vegetables daily Keep foods safe to eat Keep diet low in saturated fat Choose beverages and foods with a moderate amount of sugars • Choose and prepare foods with less salt • Moderate consumption of alcoholic beverages American Culinary Federation: Culinary Fundamentals. © 2006, Pearson Education, Upper Saddle River, NJ 07458. All Rights Reserved. Importance of Calories • Eating food unlocks energy it carries • Energy is necessary for growth, regeneration, and repair of body • Energy fuels daily activities American Culinary Federation: Culinary Fundamentals. © 2006, Pearson Education, Upper Saddle River, NJ 07458. All Rights Reserved. Source of Calories Comes from four sources 1. carbohydrates (4 calories /gram) 2. proteins (4 calories/gram) 3. fats (9 calories/gram) 4. alcohol (7 calories/gram) NOTE: There are 28 grams in 1 ounce American Culinary Federation: Culinary Fundamentals. © 2006, Pearson Education, Upper Saddle River, NJ 07458. All Rights Reserved. Factors That Influence Caloric Needs • • • • Weight Activity level Age (or life cycle) Gender American Culinary Federation: Culinary Fundamentals. © 2006, Pearson Education, Upper Saddle River, NJ 07458. All Rights Reserved. Essential Nutrients • Called “essential” if our body does not manufacture it • Some nutrients are more nutrient-dense than others • Some foods are empty calories • Some have no calories American Culinary Federation: Culinary Fundamentals. © 2006, Pearson Education, Upper Saddle River, NJ 07458. All Rights Reserved. Nutrient-Dense Foods • Carbohydrates • Are body’s preferred source of calories • Breaks down into sugar (glucose) that the body can use easily • Should supply the majority of daily calories American Culinary Federation: Culinary Fundamentals. © 2006, Pearson Education, Upper Saddle River, NJ 07458. All Rights Reserved. Functions of Carbohydrates • Provide energy for nervous system and red blood cells • Used to burn fat efficiently • Prevent protein from being burned as energy • May provide dietary fiber American Culinary Federation: Culinary Fundamentals. © 2006, Pearson Education, Upper Saddle River, NJ 07458. All Rights Reserved. Simple Carbohydrates • • • • Monosaccharides (one sugar) Disaccharides (two sugars) Easy for body to absorb Include sucrose, lactose, maltose American Culinary Federation: Culinary Fundamentals. © 2006, Pearson Education, Upper Saddle River, NJ 07458. All Rights Reserved. Complex Carbohydrates • • • • Polysaccharides (chains of sugars) Digesting takes more energy Must be broken down to simple sugars Found in plant-based foods such as grains, legumes, nuts and seeds, starchy root vegetables • Referred to as “starches” • Include fructose, glactose American Culinary Federation: Culinary Fundamentals. © 2006, Pearson Education, Upper Saddle River, NJ 07458. All Rights Reserved. Fiber • • • • Body cannot digest Non-nutritive Essential Present in unrefined complex carbohydrates • Two types, soluble and insoluble • Proportion of fiber varies from food to food American Culinary Federation: Culinary Fundamentals. © 2006, Pearson Education, Upper Saddle River, NJ 07458. All Rights Reserved. Soluble Fiber • Dissolves in water • Responsible for plant cell structure and metabolism • Helps reduce risk of heart attack • Regulates body’s use of sugars by slowing their digestion • Sources include beans, fruits, barley, vegetables, and oats American Culinary Federation: Culinary Fundamentals. © 2006, Pearson Education, Upper Saddle River, NJ 07458. All Rights Reserved. Insoluble Fiber • • • • • • • Does not dissolve in water Structural material of cell walls Absorbs water to give sensation of fullness Provides bulk in diet to aid in waste removal May prevent certain types of cancer May reduce risk of Type II diabetes Found in most fruits, vegetables, wheat bran, popcorn, nuts, whole-grain flours, meals American Culinary Federation: Culinary Fundamentals. © 2006, Pearson Education, Upper Saddle River, NJ 07458. All Rights Reserved. Protein • Should contribute 12–15 percent of calories • Nutrient essential for hormones, body tissue, enzymes, antibody production; regulates body fluids • Builds, maintains, and repairs body tissue • Transports oxygen, iron, fats, and minerals through body American Culinary Federation: Culinary Fundamentals. © 2006, Pearson Education, Upper Saddle River, NJ 07458. All Rights Reserved. Amino Acids • Building blocks of protein • Proteins in human cells are made of about 20 amino acids • Eight are considered essential • Cannot be produced in the human body; we must have a dietary source American Culinary Federation: Culinary Fundamentals. © 2006, Pearson Education, Upper Saddle River, NJ 07458. All Rights Reserved. Complete Proteins • Provide complete essential amino acids • Meats, poultry, fish, eggs, and cheese American Culinary Federation: Culinary Fundamentals. © 2006, Pearson Education, Upper Saddle River, NJ 07458. All Rights Reserved. Incomplete Proteins • Come from foods with some protein or insufficient amounts • Nuts, grains, some vegetables (quinoa) • Legumes • Must eat combinations of foods to obtain complete protein American Culinary Federation: Culinary Fundamentals. © 2006, Pearson Education, Upper Saddle River, NJ 07458. All Rights Reserved. Fats/Oils • Provide energy and fulfill bodily functions • Crucial role in flavor development • Excess can raise risk of coronary disease, obesity, and certain cancers • Amount consumed should be below 30 percent of daily calories • Should come from mono- or polyunsaturated sources • Saturated fats should not be consumed in amounts exceeding 10 percent of total daily fat American Culinary Federation: Culinary Fundamentals. © 2006, Pearson Education, Upper Saddle River, NJ 07458. All Rights Reserved. Functions of Fats • Essential for normal growth and development • Maintain structural element in cells • Assist functioning of immune system • Make fat-soluble vitamins available to our body • Enhance flavors • Produce satiety American Culinary Federation: Culinary Fundamentals. © 2006, Pearson Education, Upper Saddle River, NJ 07458. All Rights Reserved. Saturated Fat • Contains a degree of hydrogen, known as hydrogenation • Improves keeping qualities • Raises smoke point • Solid at room temperature • Results in trans-fatty acids • Known to raise blood cholesterol level • May be carcinogenic American Culinary Federation: Culinary Fundamentals. © 2006, Pearson Education, Upper Saddle River, NJ 07458. All Rights Reserved. Omega-3 Fatty Acids • Effective in reducing risk of heart disease by lowering cholesterol • Helps reduce fatty deposits in blood stream • Sources are fatty fish such as salmon, mackerel, trout, dark-green leafy vegetables, certain nuts, certain oils (polyunsaturated) American Culinary Federation: Culinary Fundamentals. © 2006, Pearson Education, Upper Saddle River, NJ 07458. All Rights Reserved. Cholesterol • Provides a fatty jacket around nerve fibers • Produces vitamin D on the skin • Types are HDL and LDL • HDL = high-density lipoproteins • LDL = low-density lipoproteins • Dietary cholesterol is found in animal foods American Culinary Federation: Culinary Fundamentals. © 2006, Pearson Education, Upper Saddle River, NJ 07458. All Rights Reserved. HDL and LDL • HDL clears cholesterol from circulatory system • High levels of HDL indicate a reduced health risk • LDL is a sticky substance that deposits cholesterol in arterial walls • High levels of LDL indicate serum cholesterol, a higher health risk American Culinary Federation: Culinary Fundamentals. © 2006, Pearson Education, Upper Saddle River, NJ 07458. All Rights Reserved. Noncaloric Nutrients • Water and its functions – Dissolves water-soluble vitamins – Removes impurities – Cushions joints – Maintains pressure on optic nerves – Stabilizes blood pressure – Regulates body temperature American Culinary Federation: Culinary Fundamentals. © 2006, Pearson Education, Upper Saddle River, NJ 07458. All Rights Reserved. Vitamins and Minerals Water-Soluble and Fat-Soluble • • • • • • Water soluble: dissolve in water Stored briefly in lean tissue Must be replenished daily Include the B-complex and vitamin C Affected by ordinary food handling Can be lost through exposure to air and heat, rinsing foods, keeping foods too long • Can be retained by shorter cooking time, small amount of water, preparation close to service, purchase often and use fast American Culinary Federation: Culinary Fundamentals. © 2006, Pearson Education, Upper Saddle River, NJ 07458. All Rights Reserved. American Culinary Federation: Culinary Fundamentals. © 2006, Pearson Education, Upper Saddle River, NJ 07458. All Rights Reserved. Fat-Soluble Vitamins • • • • • • • • Vitamins A, D, E, K Not destroyed by air or water Vitamin A present in animal foods known as retinol Beta-carotene, plant foods, orange, yellow, and darkgreen leafy vegetables Vitamin D is responsible for bone formation; prevents rickets; found in milk and cereals Vitamin E works as an antioxidant Vitamin K is associated with blood clotting; found in darkgreen leafy vegetables All are essential to maintaining good health American Culinary Federation: Culinary Fundamentals. © 2006, Pearson Education, Upper Saddle River, NJ 07458. All Rights Reserved. Minerals • Calcium, body’s most abundant mineral, develops teeth and bones • Good sources are dairy, broccoli, and leafy greens • Phosphorus releases energy from foods; found in meat, eggs, milk, cheese, fish, nuts, cereals, legumes • Sodium and potassium maintain a normal fluid balance in the body • Diets high in sodium may aggravate hypertension American Culinary Federation: Culinary Fundamentals. © 2006, Pearson Education, Upper Saddle River, NJ 07458. All Rights Reserved. Minerals (continued) • Magnesium aids in tooth and bone structure; found in green vegetables, legumes, whole grains, and nuts • Fluoride prevents tooth decay and osteoporosis; can be found in saltwater fish and tea • Iodine is essential for normal thyroid function; is added to salt in the U.S. • Iron carries oxygen to red blood cells; found in meats, whole grains, legumes, leafy vegetables, and dried fruit American Culinary Federation: Culinary Fundamentals. © 2006, Pearson Education, Upper Saddle River, NJ 07458. All Rights Reserved. Phytochemicals and Antioxidants • Occur naturally in fruits, vegetables, grains, and legumes • Tomatoes have 100+ phytochemicals • Prevents oxygen damage to cells by combining with oxygen American Culinary Federation: Culinary Fundamentals. © 2006, Pearson Education, Upper Saddle River, NJ 07458. All Rights Reserved. Nutrition Labeling • Gives consumers information on safety and quality of food • Information is on labels • NLEA requires standardized nutrition information on most packaged foods • FDA has established guidelines for manufacturers American Culinary Federation: Culinary Fundamentals. © 2006, Pearson Education, Upper Saddle River, NJ 07458. All Rights Reserved. Nutrition for Chefs • Chefs must be informed for general well-being of guests, staff, and themselves • Foods affect certain conditions • Sensitivity to diabetes, heart disease, cancer, allergies is important • You must read recipes and labels • Guests will ask for ingredient content that might be harmful to them • Be aware of all ingredients in processed foods that you buy American Culinary Federation: Culinary Fundamentals. © 2006, Pearson Education, Upper Saddle River, NJ 07458. All Rights Reserved. Cooking with Fats Wisely • Know types of fat • 1 gram has 9 calories, no matter what type • Use sparingly • Balance portion sizes of foods with high-fat contents • Look for alternatives for palatability such as coulis, salsas, relishes, compotes American Culinary Federation: Culinary Fundamentals. © 2006, Pearson Education, Upper Saddle River, NJ 07458. All Rights Reserved. Proteins • • • • • Important to a healthy diet Most Americans do not get enough Meats today are raised leaner Trimming fat cuts down on calories Use cooking techniques that do not add fat, or remove what is there American Culinary Federation: Culinary Fundamentals. © 2006, Pearson Education, Upper Saddle River, NJ 07458. All Rights Reserved.