Food Studies 30 Unit Four Protein Foods Food Studies 30 1 Unit 4 Food Studies 30 2 Unit 4 Unit Four: Protein Foods The following concept web illustrates the major topics presented in this unit. Sources of Protein Protein and Healthy Eating Making Protein Choices Principles of cooking meat Storage Food Studies 30 3 Preparing and Cooking Pulses Unit 4 Food Studies 30 4 Unit 4 Unit Overview In the previous unit, you learned about all six categories of nutrients. Unit Four will now focus specifically on protein foods. In this unit, you will look at different sources of protein and how protein contributes to a healthy diet. More specific information will also be presented that relates to the selection, storage, and preparation of protein foods. Protein is needed for growth and repair of the body. You use proteins to build new cells and to repair or replace worn out or injured cells. There is a wealth of information that exists in the area of protein foods. Various interest groups have produced on-line resources that this unit will draw on for information. The instructional material for Unit Four is meant to guide you through the sources of information on protein and help you complete the activities. Beef Information Centre http://www.beefinfo.org/default.aspx SaskPork http://www.saskpork.com/html/consumer_info/index.cfm Chicken Farmers of Canada http://www.chicken.ca Egg Farmers of Canada http://www.canadaegg.ca and http://www.eggs.ca/ Grading of meats and alternatives http://www.canadianbeef.info/ca/en/fs/quality/qa_attrib.aspx http://www.canadianbeef.info/ca/en/fs/quality/default.aspx Food Studies 30 5 Unit 4 Sources Of Protein Many animal and plant foods provide proteins. The following diagram illustrates some of the protein foods of animal origin and plant origin. Animal Origin Plant Origin Pulses Meat Meat is the edible portion of mammals. In Canada the major meat sources are beef and pork. Other sources include lamb, venison (deer, moose, elk) and specialty livestock such as bison, llamas and wild boar. Pulses are the dried edible seeds of legume plants (lentils, peas and beans) consumed by humans. Dried pulses were brought to North America as a portable food sources. They were easy to carry and non-perishable. They are also a source of protein. Fish Two kinds of fish are most common, finfish and shellfish. Finfish is often just called fish. These animals have fins and backbones. Common examples would be salmon, trout, and pickerel. Can you name others? Tofu is an example of a product made from pulses. It is made from soybeans (soybean curd). Nuts and Seeds Shellfish have shells instead of backbones. Shrimp, crab and oysters are examples. Poultry Nuts and seeds are high in protein. There are many varieties of nuts and seeds available these days. Almonds, cashews, peanuts, walnuts, pumpkin seeds and sunflower seeds are examples of popular nuts and seeds. Poultry refers to any bird raised for meat. Chicken, ducks, geese and turkeys are examples. Poultry also has specialty livestock like ostrich and emu. Eggs Milk Food Studies 30 6 Unit 4 Protein and Healthy Eating The meat and alternatives group of the Canada Food Guide is the primary source of protein. The Food Guide recommends that a healthy eating plan include two to three servings of meat and alternatives every day. Alternatives include the sources listed previously, other than meat. How Much Do You Need? If you eat the recommended two to three servings from the meat and alternatives group you are probably eating enough protein. Exact protein needs are based on your weight, gender, and activity level. The formula below can help you calculate your needs. Add 15 to 25 additional protein grams to the total if you are a moderate or regular exerciser. Estimate Your Daily Protein Needs Your weight in kilograms x 0.86 = ________________________ (1 kg = 2.2 lbs) Required grams per day Food Studies 30 7 Unit 4 Complete and Incomplete Protein Proteins are made up of amino acids which are necessary for the maintenance of the human body cell. Your body can manufacture most of the amino acids it requires to build protein. It can’t, however, produce nine amino acids needed by your body. These amino acids must come from the food you eat and are called essential amino acids. Protein that you eat can either be complete or incomplete. Complete protein supplies all of the essential amino acids and will support growth and normal maintenance of body tissues if eaten in correct amounts. Incomplete protein is missing one or more of the essential amino acids. Incomplete proteins can be combined to make complete protein sources. Proteins from animal sources such as fish, poultry, eggs, milk, and meat are complete proteins while proteins from plant sources such as pulses, nuts, and cereals/whole grains are incomplete proteins. When selecting a meat alternative it is important to select the correct combination in order to make a complete protein. By combining two or more incomplete proteins, which together provide all the necessary essential amino acids, you have complementary proteins. The proteins in pulses and grains generally complement each other in this way. When combined, the two foods provide a higher quality protein than either would have provided alone. Food Studies 30 8 Unit 4 Complementary foods do not have to be consumed at the same meal to achieve a complete protein. Just make sure the complementary proteins are eaten within a few hours of each other. The following chart outlines some complementary proteins. Use your resources to create some specific examples of complementary proteins. Complementary Protein Partners Pulses Incomplete Protein + Complementary Protein = Complete Protein Seeds and Nuts Whole Grains Milk is a complete protein, and can supplement any of the incomplete proteins above. Food Studies 30 9 Unit 4 Lean Protein Choices Healthy eating focuses on eating less fat. Except for pulses, most of the foods in the meat and alternatives group can potentially provide large amounts of fat. For this reason, it is important to make wise choices regarding the type of protein, the serving size, and the method of preparation so that you do not eat too much fat. The nutrients are found mostly in the muscle, while the fat is found mostly along the sides of the muscle. Streaks of fat also run through the muscles of animals. This streaking is called marbling. The more marbling meat has, the more fat it contains. Protein is a necessary part of healthy eating. Help to control the amount of fat you eat in protein foods by using some of the following suggestions. trim visible fat from meat cuts remove the skin from poultry watch portion sizes select lean cuts, and choose lower fat deli meats such as turkey, chicken breast, and roast beef if you include high fat choices like nuts, use them in moderation drain the fat from cooked ground meat or buy lean ground beef roast, broil, or barbecue meat to allow the fat to drip off Food Studies 30 10 Unit 4 A protein source is considered lean if it has less than 10 grams of fat in a 100 gram serving. One lean meat and alternatives serving equals 50 – 100 grams. A 90 gram (3 ounce) serving of lean, trimmed, cooked meat is about the size of a deck of playing cards. Very Lean or Lean Meat And Meat Alternative Choices Using your resources, fill in the table that follows with very lean and lean sources of meat and meat alternatives. Meat Very Lean Choices Meat Alternates Meat Lean Choices Meat Alternates Besides the amount of fat, another consideration is the type of fat that is present. Be aware of the amount of saturated and unsaturated fat levels. Remember that healthy eating involves choosing fewer saturated fats. Food Studies 30 11 Unit 4 Vegetarianism Some people choose to not eat meat. This is called vegetarianism. There are different types of vegetarians, and some derive protein from food made from animal origin (example: cheese, milk, eggs). To be healthy, vegetarian diets require special planning to include essential nutrients that are found only in foods of animal origin. It is extremely important that vegetarians consider these potential nutrient deficiencies. Review what you have learned about combining complementary proteins. vitamin B12 vitamin D calcium zinc iron Following a vegetarian diet doesn’t mean that it is impossible to obtain these nutrients, it just requires planning. You may need to find appropriate plant replacements, or perhaps eat foods fortified with these nutrients, or take a supplement. Food Studies 30 12 Unit 4 Activity One: Nutrition and Protein Mark 20 Use the information within the course and from the other reliable sources you have accessed to answer the following questions. (5) (4) 1. 2. Food Studies 30 True/False: Circle the T beside each statement that is True. Circle the F beside each statement that is False. T F a. An average person needs at least 250 grams of protein daily. T F b. The leanness of protein relates only to the number of calories it contains. T F c. Eating meat is the only way to get complete, high quality protein in your diet. T F d. Vegetarianism is a fad diet for people worried about their weight. T F e. Nuts are an incomplete source of protein. T F f. One Grade A large egg provides about ten grams of total fat. T F g. An egg is a lean protein source. T F h. Eggs contain all nine essential amino acids. T F i. One serving of cooked meat is about the size of a loonie. T F j. Meat with marbling is leaner than meat without marbling. Identify four vitamins or minerals found in protein of animal origin. 13 Unit 4 (6) (5) 3. 4. Explain the difference between the following terms. complete proteins and complementary proteins essential amino acids and essential fatty acids whole grains and pulses Matching: There are many ways in which plant proteins can be combined to form a complete protein. Some of the examples of combinations are listed in Column A. In the space provided in front of each item in Column A, write the letter of the correct food example from Column B. Column A Column B _______ milk and rice _______ beans and whole grains _______ pulses and whole grains _______ nuts and whole grains _______ pulses and nuts a. peanut butter sandwich made with whole wheat bread b. baked beans served with a slice of whole wheat bread c. lentil soup and whole wheat crackers d. rice pudding e. lentil and pecan cookies Food Studies 30 14 Unit 4 Making Protein Choices There are several choices consumers can make regarding protein. To make wise decisions start by looking at the labeling of protein foods and how the different choices vary in nutrition, tenderness, and cost. Labeling When purchasing protein always read the label. Labels contain valuable information regarding the protein you are buying. One important piece of information is the type of protein. Meats and poultry are identified by a cut. Cuts refer to the part of the animal from which the meat comes. For marketing, meat is first divided into large wholesale cuts. These wholesale cuts are divided into smaller retail cuts which you find in the grocery store. Wholesale cut information is useful since it indicates the degree of tenderness and appropriate cooking method. On a label, the type of meat is listed first (example: beef, pork), followed by the wholesale cut and then the retail cut. The price of meat depends partly on the cut. Tender cuts are in demand, so their price is high. Other cuts are less in demand, so their price is lower. Depending on the source of the protein, the label may or may not indicate a grade. Grading is voluntary for some forms of protein. For example, in Canada, you will generally find poultry graded with the grade (Canada A, B, utility, or C), but it can also be sold as ungraded. Most common in our grocery stores would be Grade A (a meaty bird with a good covering of fat, free of pinfeathers, and free from appearance defects), or utility (a Grade A or B quality bird, but with a part missing) poultry. These quality grades do not judge the poultry’s tenderness or flavour. For other meats, being aware of grading systems that may have been used can help you determine eating quality. The grade also affects price. Higher grades cost more than lower ones. You can refer to the resources listed in the Unit 4 Overview to find what grades are commonly used for meats and meat alternatives in Canada. Food Studies 30 15 Unit 4 Cost Meats are costly food items. The price of meat includes the parts you eat and those you don’t eat. Fat and bone that you throw away raise the cost per serving of the cut of meat. The cost per serving is the price you pay to serve one person at one meal. Buying by the cost per serving rather than the price per kilogram can help you determine which meat product is a better buy. A boneless roast may cost more per kilogram but less per serving. Calculate the cost per serving by using the two following method. Method : cost___________ X suggested serving size Quantity (number of grams) For example, if a kilogram jar of peanut butter cost $3.99, and each suggested serving of peanut butter is 57 grams. Quantity: 1 kilogram = 1000 grams Now use the formula: $3.99 X 57 g = $0.23 1000 g This guide outlines the amount of unprepared protein needed to produce one serving. Ground meat Boneless pork or beef roast Roast, with bone Steak or chops, with bone Whole chicken Chicken legs or breast Peanut butter Processed meat Eggs Food Studies 30 100 grams 115 grams 135-160 grams 200 grams 310 grams 75 grams 57 grams 90 grams 2 eggs 16 Unit 4 To help you cut your protein costs, consider some of the following suggestions. Frozen meat, fish, and poultry products are sometimes cheaper than fresh products. Processed meats are usually high in fats, salt, calories, and price but not so high in protein. Substitute less expensive meats for the ones called for in a recipe. Cut your own beef cubes for stew from less expensive meat. Cut your own steaks from roasts. Reduce the amount of meat called for in a recipe and add more vegetables, grains, or pulses to make the dish go a little further. Tender cuts are often more expensive than less tender cuts. Knowing how to cook less tender cuts can help you save money. Marinade less tender cuts. Processing provides convenience but increases the cost of meat. For instance, sausage and ready-to-eat meats often cost more per unit than fresh cuts. Boneless meat and poultry is generally more expensive than cuts sold with the bone. You may be able to save money by removing the bones yourself. Check the cost per serving. Try a meatless meal. Pulses are relatively inexpensive compared to most other protein sources. They can be purchased canned (drain and rinse before using) or to save even more, they can be purchased dried (many need to be soaked before cooking). Food Studies 30 17 Unit 4 Tenderness Meat tenderness is a desirable quality and, therefore, it is another consideration when shopping for meat, poultry, and fish. You will see later in this unit that tenderness can affect your choice of cooking method. A cut of meat contains four basic types of tissue: muscle tissue, connective tissue, fat, and bone. When it comes to tenderness, the most important factor is muscle tissue. Muscles receiving little exercise are the most tender. Therefore, the location of the meat in the animal indicates tenderness. Fat content can also have an effect on tenderness. Meat that has more marbling is more tender. Wholesale meat cuts have distinctive bone shapes. You can use bone shape as a method to identify meat cuts and tenderness. For example, the rib or T-shaped bones indicate tender meat. Food Studies 30 18 Unit 4 Activity Two: Buying Protein Foods Mark 25 Use the information within the course and the resources identified in Unit 4 to answer the following questions. (6) 1. Identify one wholesale cut and two retail cuts from the charts given in the resources in Unit Four for each meat listed below. Type of Meat Example Of A Wholesale Cut Beef Examples Of Retail Cuts 1. 2. Pork 1. 2. (3) 2. Food Studies 30 Identify three factors that determine the cost of foods from the meat and alternatives food group. 19 Unit 4 (3) 3. List three tips for selecting protein to help limit the amount of fat consumed. (9) 4. Compare the grading systems used for each of the following protein sources. Protein Source Highest Grade Other Grades Basis For Grades Beef Poultry Eggs Please note that pork is not graded because the meat is more uniform in quality. Food Studies 30 20 Unit 4 (1) 5. All grades of meat have the same nutrients, except for fat. Give an example of when you could use a lower grade of meat or poultry for a recipe. (3) 6. Discuss the Canadian government’s role in regulating the marketing and sale of meat. Food Studies 30 21 Unit 4 Activity Three: Cost Of Protein Servings (14) Mark 14 It is important to obtain the most nutrition for your food dollar spent. Calculate the cost per serving of the following protein foods. Use the procedure described in the instructional material for Unit Four. You will need to visit a grocery store to determine the current cost of each item. Show all your calculations in the space provided on both sides of the page. Food Item Cost Suggested Serving Size Quantity (in grams) Cost Per Serving (as determined by chart in course) Peanut Butter Wieners/ Hot Dogs Roasting Chicken Food Studies 30 22 Unit 4 Food Item Cost Suggested Serving Size Quantity (in grams) Cost Per Serving (as determined by chart in course) Boneless Beef Or Pork Roast Beef Or Pork Roast With Bone T-Bone Steak Egg Food Studies 30 23 Unit 4 Storage Fresh meat, poultry, and fish spoil very quickly. Preserve their freshness by keeping them in the refrigerator or freezer. Processed meat can be stored for a longer time than fresh meat. After you purchase fresh meat and poultry, store it in the coldest part of the refrigerator or package it and store in the freezer. You can keep dried pulses for a very long time if they are in tightly covered containers in a cool, dry place. The longer they are kept, however, the drier they become and even after soaking they may take longer to cook and remain slightly chewy after cooking. Plan to use them within a year. Once they are cooked, pulses are like other protein foods and should be kept refrigerated for three to four days, or frozen for up to six months. Information in the Unit Four resources outlines some specific storage requirements for different protein foods. Principles of Cooking Meat Cooking makes protein tender, tasty, appealing, and easier to digest. In order to achieve a desirable product, care must be taken in choosing an appropriate cooking method and temperature, and checking for doneness. Choosing a Cooking Method The best way to cook a cut of meat depends on how tender the cut is, personal preferences, and the time you have available to cook the meat. Remember that meat consists of muscle tissue, connective tissue, fat, and bone. These four factors influence how tender a cut of meat is. Tender meats have the greatest number of cooking options. These cuts can be cooked with dry heat, such as broiling, roasting, or frying. Less tender cuts of meat need to be tenderized during cooking. There are different ways to tenderize meat if it is required. Food Studies 30 24 Unit 4 Mechanical Grind, pound, or cut meat (across the grain). These methods break the connective tissue. Moist Heat Cooking Cook meat in a liquid. The liquid softens the connective tissue. Chemical Food acids such as fruit juices, vinegar, wine, beer, and soya sauce soften connective tissue in meat. These foods are used in marinades. Piercing the meat helps the marinade. to penetrate the meat. Powdered meat tenderizer sprinkled on the surface of meat also breaks down the connective tissue. Checking Doneness Doneness indicates that the cut has cooked long enough for the necessary changes to take place so it is a pleasure to eat. There are varying degrees of doneness but all cuts must be cooked long enough so they are safe to eat. Protein foods achieve doneness through cooking. Doneness is determined through factors such as internal temperature, colour, time, and texture. Internal temperature must be determined by using a meat thermometer. This method is used when roasting or microwaving cuts of meat more than 5 cm (2 in) thick. To be safe to eat, the internal temperature of meat and poultry should reach 71° C (160° F). If you use other cooking methods, thinner cuts, or do not have a meat thermometer, test for doneness by checking the inside colour. The breast meat in poultry, for example, should be cream or white in colour. Refer to the several websites that are referred to in Unit Four for specific information about cooking different protein foods. You will also find several meat recipes. Activity Five requires you to examine cooking methods and ingredients. Food Studies 30 25 Unit 4 Preparing and Cooking Pulses Except for lentils and split peas, pulses need to be soaked before cooking. 1. Pick over pulses. Discard foreign matter. Rinse. Drain. 2. Soak using one of the following methods. a. Overnight Soak – for every 250 ml (1 cup) of beans or whole peas, add 750 ml (3 cups) of water. Let stand twelve hours or overnight. Drain soaking water and cook according to the recipe you have chosen. b. Quick Soak – for every 250 ml (1 cup) of beans or whole peas, add 750 ml (3 cups) of water. Slowly bring to a boil and boil gently for two minutes. Remove from the heat, cover, and let stand one hour. Drain and cook. Pulses can be cooked on top of the stove, in the oven, in a slow cooker, in a pressure cooker, or in the microwave oven. They do not cook quickly; they need to be simmered in water or other liquids in order to have time to become tender. Add acidic ingredients (like tomatoes or lemon juice) and salt after the softening process has begun. For lentils and split peas, rinse well and drain. Place in a cooking pot and add twice the amount of water. Cover, bring to a boil, and then reduce heat and simmer for the appropriate amount of time. For more information about pulses and preparing meat alternatives, you can check out the following Web sites: www.saskpulse.com or www.homefamily.net Food Studies 30 26 Unit 4 Activity Four: Storing And Cooking Protein Mark 27 Use the information in the course as well as the Unit Four resource websites to answer the questions within this activity. (15) Part A. 1. 2. If a meat is cooked using a dry-heat method, this means that it is ***. ____ ____ a. b. ____ c. ____ d. Braising Stewing Pot roasting Each of the above a. b. c. d. Tongs A fork A skewer A meat thermometer Most pork cuts should be roasted at an oven temperature of *** to produce a tender and safe product. ____ ____ ____ ____ Food Studies 30 a. b. c. d. *** should be used for turning meat while barbecuing to ensure you do not lose important juices. ____ ____ ____ ____ 4. dehydrated cooked uncovered without the addition of a liquid cooked until the internal temperature is 200° C (400° F) cooked from a frozen state *** is a moist-heat method of cooking meat. ____ ____ ____ ____ 3. Multiple Choice: Select the best answer to complete each of the following statements and place a check () beside it. a. b. c. d. 70° C (160° F) 160° C (325° F) 190° C (375° F) 200° C (400° F) 27 Unit 4 5. Regular ground beef contains *** fat compared to lean ground beef. ____ ____ ____ ____ 6. 8. ____ ____ a. b. ____ ____ c. d. carve it immediately let it cool entirely at room temperature and then carve it slice it with the grain of the meat cover it with foil and let stand for 10-15 minutes before carving a. b. c. d. produce connective tissue cause trichinosis cause freezer burn dry out the meat and make it tough Aging of beef ***. a. b. c. d. improves tenderness can be safely done in a home refrigerator increases the grade of the meat increases the degree of toughness Ground beef made from a specific cut of meat (example: round, sirloin) and not blended with any other trimmings is called *** beef. ____ ____ ____ ____ Food Studies 30 at the beginning of cooking that needs tenderizing during the last minutes of cooking just before the meat is removed from the grill Overcooking meat tends to ***. ____ ____ ____ ____ 10. a. b. c. d. After removing a meat roast from the oven you should ***. ____ ____ ____ ____ 9. more less the same amount of no Sauces or glazes should be generously added to barbecued meat ***. ____ ____ ____ ____ 7. a. b. c. d. a. b. c. d. seasoned extra lean premium ground certified 28 Unit 4 11. 12. Fresh meat purchased from a grocery store is prepared for freezer storage***. ____ a. ____ b. ____ ____ c. d. Moist-heat cooking methods are good choices for preparing less tender cuts of meat because ***. ____ ____ ____ ____ 13. Food Studies 30 these cuts contain more marbling it prevents charring they soften connective tissue they contain a lot of fat a. b. c. d. using the same methods as meat in fifteen minutes without the addition of water or other liquids on the stovetop, in the oven, in a slow cooker, in a pressure cooker, or in the microwave oven When using a moist-heat cooking method, the meat/liquid mixture should be ***. ____ ____ ____ ____ 15. a. b. c. d. Pulses are cooked ***. ____ ____ ____ ____ 14. by keeping it in the Styrofoam tray and plastic wrap it is purchased in if it is wrapped in brown paper, plastic freezer bags, or heavy-duty aluminum foil when air has been added to the package when mould begins to grow on the meat a. b. c. d. boiling simmering uncovered stirred every five minutes Quick soaking and marinating ***. ____ ____ a. b. ____ ____ c. d. mean the same thing are cooking methods used to make a meat dish go further are used to tenderize protein foods both use an acidic food 29 Unit 4 Part B. (6) 1. Short Answer Complete the following chart that summarizes how to determine doneness of different meats. Factors To Consider When Evaluating Doneness Meat Type Internal Temperature Beef Colour Rare Rare Medium Medium Well-Done Well-Done Ground Meats Pork Poultry Food Studies 30 30 Unit 4 (3) 2. Explain how to use a meat thermometer to determine the internal temperature of meat. (3) 3. Identify one of the interest groups that produced the websites referred to in Unit Four. Do you think it is a reputable organization that can provide accurate information about protein? Explain why. If you wanted to obtain more information or recipes for cooking protein, list the name of an agency or organization, along with a contact address, phone/fax number, or Internet/e-mail address you could use. Food Studies 30 31 Unit 4 Activity Five: Recipe Analysis (14) Mark 14 From the recipes included within the website links in Unit Four, or from other recipe sources, find a recipe that meets the requirements that follow. Write or print out a copy of each recipe and attach it to the assignment. 1. 2. 3. Food Studies 30 uses a chemical method to tenderize meat recipe name where recipe was found identify the ingredient(s) used to soften the connective tissue uses a moist-heat method to tenderize meat recipe name where recipe was found identify the moist-heat method used uses a dry-heat method to cook meat recipe name where recipe was found identify the dry-heat method used 32 Unit 4 4. 5. 6. 7. Food Studies 30 uses a mechanical method to tenderize meat recipe name where recipe was found identify the mechanical method used uses a less tender (economical) cut of meat recipe name where recipe was found identify the cut of meat used can be prepared in thirty minutes or less recipe name where recipe was found identify one factor that makes the recipe quick to prepare uses a meat alternative to help the meat dish go further recipe name where recipe was found identify the meat alternative ingredient(s) 33 Unit 4 Unit Summary The concept web presented at the start of the unit will remind you about the important topics discussed in Unit Four. As you leave this unit, look back on some of the major topics that you have learned about. Think as well about how you could apply your learning in your daily life. The following concept web illustrates the major topics presented in this unit. Sources of Protein Protein and Healthy Eating Making Protein Choices Principles of cooking meat Storage Food Studies 30 34 Preparing and Cooking Pulses Unit 4 Food Studies 30 35 Unit 4