An Invitation to Health Personal Nutrition Slide Show Developed by: Richard C. Krejci, Ph.D. Professor of Public Health 2.22.16 Chapter Objectives Identify the macronutrients and micronutrients, their food sources, chief functions, and signs of deficiency/excess. Describe the key themes of the USDA ChooseMyPlate® Food Guidance System. List the major digestive organs and describe their role in the process of digestion. Explain how to interpret the nutritional information provided on food labels. Describe the steps that can be taken to reduce food-borne illnesses. List three specific dietary changes that you could incorporate into your daily life to achieve or maintain a healthy diet. In this Chapter, you will…… Types of nutrients Understand USDA ChooseMyPlate® system Anatomy/Physiology of digestion Protect from food-borne illness Learn How To Make dietary changes Interpret food labels HEALTH APPEARANCE Nutrition The science devoted to the study of dietary needs for food and the effects of food on organisms. BEHAVIOR PRODUCTIVITY Behavioral Modification Behavioral change, such as following a healthier diet, should be viewed as a lifetime goal, not a temporary fix! Image taken from Anspaugh, DJ, Hamrick, MH, and Rosato, FD, Wellness: Concepts and applications, Fourth Edition, McGraw-Hill Publishers. These Nutrients Are Essential In Our Diet Carbohydrates Proteins •Simple sugars •Starches •Dietary fiber Minerals 15 req’d in diet Calcium, iron, selenium Water 11-15 cups/day • Made of amino acids • 9 essential amino acids Six Categories of Essential Nutrients Fats • Saturated • Unsaturated • Fatty Acids • Cholesterol Vitamins Fat soluble ADEK Water soluble Bs and C Key Nutrition Terms Term Definition Essential Nutrients Nutrients that the body cannot manufacture for itself and must obtain from food. Macronutrients Nutrients required by the human body in the greatest amounts, including water, carbohydrates, proteins, and fats. Micronutrients Vitamins and minerals needed by the body in very small amounts. Two Categories Of Essential Nutrients Macronutrients Carbohydrates Proteins Fats Micronutrients Vitamins Minerals Water is the most essential nutrient to sustain life Major Role of Nutrients in Diet Growth and development Provide energy (calories) Regulate metabolism What is a calorie? Major Roles of Nutrients Nutrients Growth and Development Carbohydrates Lipids (fats) Proteins * Minerals Vitamins Water * Energy * * * Regulate Metabolism * * * * Nutrition and Public Health US diet is too high in calories, sugar, fat, saturated fat, and sodium (salt). US diet lack enough fiber. Over half of all annual deaths can be linked to chronically poor nutrition habits. High fat and cholesterol increase the risk of atherosclerosis and coronary heart disease. Researchers believe that 30 - 50% of cancers are dietrelated. Chronic diseases such as obesity, diabetes mellitus, and osteoporosis have all been associated with poor nutrition habits. Accessory Organs That Aid Digestion Digestive Tract Organs That Contain the Food Salivary Glands Donate a starch-digesting enzyme Donate a trace of fat-digesting enzyme (important to infants) Mouth Chews and mixes food with saliva Esophagus Passes food to stomach Stomach Adds acid, enzymes, and fluid Churns, mixes, and grinds food to a liquid mass Liver Manufactures bile, a detergent-like substance that facilitates digestion of fats Small Intestine Secretes enzymes that digest carbohydrate, fat, and protein Cells lining intestine absorb nutrients into blood and lymph Gallbladder Stores bile until needed Bile Duct Conducts bile to small intestine Large Intestine (Colon) Reabsorbs water and minerals Passes waste (fiber, bacteria, any unabsorbed nutrients) and some water to rectum Pancreatic Duct Conducts pancreatic juice into small intestine Rectum Stores waste prior to elimination Pancreas Manufactures enzymes to digest all energy-yielding nutrients Releases bicarbonate to neutralize stomach acid that enters small intestine Anus Holds rectum closed Opens to allow elimination The Digestive System 6-1, p. 153 139 Fig. 8-1, How Many Calories Do I Need? Calories – The measure of the amount of energy that can be derived from food. Basal Metabolic Rate – The number of calories needed to sustain your body at rest. Factors Affecting Calorie Needs – Gender, age, body-frame, weight, percentage body fat, basal metabolic rate and activity level. Estimations of Daily Calorie Needs Macronutrient Recommendations (AMDR) Average Macronutrient Distribution Range (cal/gram) Percentage of caloric intake Carbohydrates 4 45-65% Fat 9 20-35% Protein 4 10-35% Water 0 64 oz/day Macronutrient Energy Water Functions of Water – – – – – Carries nutrients. Maintains temperature. Lubricates joints. Helps with digestion. Rids the body of wastes through urine. – Contributes to the production of sweat. Water in the Body – Blood: 85% water – Muscles: 70% water – Brain: 75% water Daily Water Losses – ~64-80 ounces of water a day are lost via perspiration, urination, bowel movements, and normal exhalation. Protein: (Amino Acids - 20) Non-essential Essential (9) (11) Sources of Protein Animal (complete) – lean meats, low fat dairy products Vegetable (incomplete) – beans, nuts, legumes, grains Protein Requirements RDA average = .8 g/kg/day RDA athlete = 1.2-1.6 g/kg/day Extremely high levels of protein intake above 2 g/kg/day can be harmful to the body! Manufacturing Hotdogs … Protein Recommendation 15% or less .8 grams per kilogram Not more that 1.6 grams per kilogram of body weight Implementation Two 3 oz. servings of lean meat, fish, poultry or other sources each day Protein supplements are not recommended Carbohydrates (2 types) Simple (soft drinks, candy, sweets) Complex (pasta, rice, breads, potatoes) In the American Culture, kids are drinking more sweetened carbonated beverages “liquid candy” than ever before! Major Types of Carbohydrates H2O soluble Percent of daily carbohydrate intake Dangerous Trends in U.S. Carbohydrate Consumption 35% 50% Simple/Refined 55% 65% 50% 45% 40% 1910 1950 1990 2010 Complex Carbohydrates Recommendation 45-65% of daily calories 25% or less simple carbohydrates Increase dietary fiber (soluble & insoluble) Fewer simple sugars (sweets) Implementation Follow guidelines from ChooseMyPlate® for amounts of fruits and vegetables Follow guidelines from ChooseMyPlate® for whole grain breads, cereals, pastas, brown rice, oats Limit soft drinks, candy, cakes, cookies, pastries, pies, and sugar dominated cereals. Two Types of Fiber Soluble - decreases cholesterol levels oat bran fruits/veggies Insoluble - reduces risk of colon cancer wheat bran grains Recommendation: 25-35g per day! Basic Ways to Get More Fiber Fiber is present in leaves, skins, roots, and seeds. Eat more fruits and vegetables. Eat lots of whole grain cereals and breads. A Grain of Wheat BRAN - B vitamins - minerals - dietary fiber GERM - essential fats - minerals - vitamins (B's , E and folacin) Image taken from: http://www.cspinet.org/nah/wwheat.html ENDOSPERM - starch - protein - some iron and B vitamins Refined Foods Many key nutrients are lost when grains are refined Image taken from: http://www.cspinet.org/nah/wwheat.html Dietary Fiber Food Dietary Fiber (grams) Grains All Bran, 1/3 cup Granola (homemade), cup Shredded Wheat, 1 biscuit 10.0 6.0 2.7 Fruits Avocado, medium Pear (with skin), 1 medium Orange (no peel), 1 medium Apple (with skin), 1 medium Peach (with skin) 1, 1 medium 7.0 4.0 3.0 2.4 2.3 Vegetables Green peas, 1/2 cup Potato (with skin), 1 medium Broccoli, cup Brussels sprouts, cup Corn, cup 4.0 3.5 3.4 3.0 3.0 More Dietary Fiber Sources Food Dietary Fiber (grams) Nuts: Almonds 1/4 cup, Peanuts, 1/4 cup Peanut butter, 2 Tbsp., Beans: Dried beans(cooked): Black beans, cup Black-eyed peas, cup Kidney or navy beans, cup Peas, cup Lentils, cup 8.0 3.3 2.3 8.5 8.0 8.0 6.2 5.7 5.0 Too Much Fiber Can be Detrimental to Health Fiber supplements are rarely recommended Can produce loss of calcium, phosphorus, and iron Can cause gastrointestinal discomfort When eating more, drink more water, as too little fluid can cause constipation and even dehydration. Sources of Fats Animal (saturated) Exception is coconut or palm oil Hا H اHا Hا H اOH ا H - C ا- C ا- C ا- C - C ا- C - Glyceride H H H H H Vegetable (unsaturated) Can be hydrogenated Poly-unsaturated into “transfatty acids” Mono-unsaturated H H H H H H H H OH ا ا ا ا ا ا ا ا ا H - C - C ا- C - C = C - C = C - C - C - Glyceride ا ا ا H H H Double Bonds H Food Labeling Item Back on Jan. 1, 2006, the Food and Drug Administration (FDA) requires food companies to list trans fat content separately on the Nutrition Facts panel of all packaged foods. Trans fats The majority of trans fat can be found in shortenings, stick (or hard) margarine, cookies, crackers, snack foods, fried foods (including fried fast food), doughnuts, pastries, baked goods, and other processed foods made with or fried in partially hydrogenated oils. Some trans fat is found naturally in small amounts in various meat and dairy products. Comparison of Dietary Fats 0 20 40 60 80 TYPE OF FAT Coconut oil 0 Palm kernel oil 0 Butter (fat) 33 Beef tallow 14 Palm oil 0 Lard 12 Chicken fat 11 Veg. Shortening 0 Cottonseed oils 0 Margarine 0 Peanut oils 0 Soybean oils 0 Olive oils 0 Corn oils 0 Sunflower oils 0 Safflower oils 0 Canola oils 0 Cholesterol (mg) % Saturated Fat % Monounsaturated % Polyunsaturated 100 Saturated Fat Foods high in saturated fat include fatty beef, veal, lamb, pork, lard, poultry fat, butter, cream, milk, cheese and other dairy products made from whole milk. These foods also contain dietary cholesterol. Foods from plants high in saturated fat include coconut oil, palm oil and palm kernel oil (often called tropical oils), and cocoa butter. An Apple a Day.... Will not keep the doctor away if most meals are high in fat content! Fats Recommendation Implementation 20-35% Choose lean meats 7% or less saturated Choose low fat foods < 300 mg cholesterol Limit egg yolks Use unsaturated oils: Choose foods with a polyunsaturated to saturated ratio of at least 1.0. Eat fish at least twice each week How to understand % of calories from fat in your diet... What is Bologna? 80% "fat free” 52 calories / slice 4 grams fat / slice Calories = 4 g/slice X 9 cal/g = 36 calories from fat Percent of calories = 36 cal / 52 cal total = from fat 69% What About Sliced Turkey? 98% "fat free” 30 calories / slice 1 gram fat / slice Calories = 1 g/slice X 9 cal/g = 9 calories from fat Percent of calories = 9 cal / 30 cal total = from fat 30% Recommendations to Decrease Your Intake of Fat Minimize "fast" food choices Minimize processed foods Use leaner cuts of meats Use low fat or “fat-free” alternatives Decrease the use of condiments Eat lower fat snacks Fat Substitutes Olestra (Olean) – Binge snacking may provoke diarrhea, cramps and gas – Soaks up fat soluble vitamins before the body can absorb them from foods just eaten. Simplesse – used in refrigerated and frozen foods – few side effects reported What are the future implications of these new food products? Vitamins (2 types) Fat soluble • A, D, E, K Water soluble • C and B complex (8) Table 6.4, page 152 Are necessary for normal bodily metabolism, growth, development and regulation (coenzymes). Megadoses of Vitamin Supplements Provide no health benefits Many can be toxic at high doses! Antioxidants The antioxidant effect of beta-carotene, vitamins C and E, and the mineral selenium appear to protect against certain diseases (including heart disease and cancer) by preventing oxygen-free radicals from damaging cells and by stopping the sequence of reactions once damage has begun. heart disease cancer, emphysema Free Radicals- solar radiation, cigarette smoke, others Antioxidants Cell DNA Antioxidants Nutrient Food Sources Antioxidant Effect Vitamin C Citrus fruit, kiwi fruit, cantaloupe, strawberries, broccoli, green or red peppers, cauliflower, cabbage Appears to inactivate oxygen- free radicals Vitamin E Vegetable oils, yellow and green leafy vegetables, margarine, wheat germ, oatmeal, almonds, and whole grain breads, cereals Protects lipids from oxidation Beta-carotene Carrots, squash, pumpkin, sweet potatoes, broccoli, green leafy vegetables Soaks up oxygen-free radicals Selenium Helps prevent damage to cell structures Seafood, meat, whole grains Minerals (2 types) Major (>100 mg per day) • Na, K, Cl, Ca, P, S Trace (< 100 mg per day) • Fe, Zn, Se, Mo, I, Cu, Mg, F, Cr pg 153-4 Are structural components of all cells Maintain H2O and acid-base balance Regulate muscular and nervous tissue excitability, blood clotting and normal heart rhythm. Are components of pigments and enzymes. Are You at Risk for a Nutritional Deficiency? Group Nutrients of Concern Teenage Girls • Women of child-bearing age • Persons over age 50 • Vitamin B12 The elderly, persons with dark skin and individuals without adequate exposure to the sun • Vitamin D Iron • Calcium Iron • Folic Acid Iron Important component of hemoglobin Populations at risk Physical activity Iron loss Physical activity Urine Stools Iron deficiency is known as anemia – (Symptoms: shortness of breath, pale skin, fatigue) Food Dietary Sources of Iron Iron Meats: Liver, 3 oz Round steak, 3 oz Baked beans, cup 7.5 mg 3 mg 3 mg Grains: Breakfast cereal, iron fortified, 1 cup Oatmeal, fortified, cooked 1 cup Bagel, English muffin 8 mg 8 mg 1.7 mg Fruits Prune juice, 1 cup Apricots, dried, cup Prunes, 5 medium 9 mg 2.5 mg 2.0 mg Vegetables: Spinach, cooked , cup Lima beans, cup Black-eyed peas, cup Asparagus, cup 2.3 mg 2.2 mg 1.7 mg 1.5 mg Sourced: USDA Handbooks Nos. 8-1 and 456 Calcium Description • • • Builds strong bone tissue throughout life. Plays a vital role in blood clotting, and muscle and nerve functioning. May help control high blood pressure, prevent colon cancer in adults, and promote weight loss. Calcium Characteristics • Adequate calcium intake during childhood, adolescence, and young adulthood is crucial to prevent osteoporosis. Calcium Dietary Recommendations • 13-19 years: 1300 mg/day • 19-51 years: 1000 mg/day • 51 yrs+: 1200 mg/day Dietary Sources of Calcium Food Whole milk, 1 cup Lowfat milk, 1 cup (2 percent) Skim milk, 1 cup Low-fat yogurt, 1 cup (plain) Low-fat yogurt, 1 cup (fruit-flavored) Swiss cheese, 1 oz Cheddar cheese, 1 oz Brick cheese, 1 oz Pink salmon, 3 oz (canned with bones) Sardines, 3 oz (canned with bones) Kale, cooked, 1 cup Broccoli, cooked, 1 cup Sourced: USDA Handbooks Nos. 8-1 and 456 Calcium 291 mg 297 mg 302 mg 415 mg 345 mg 272 mg 204 mg 191 mg 167 mg 372 mg 206 mg 136 mg Osteoporosis Bone-weakening disease. Strikes 1 in 4 women over age 60. Peak Bone Mass • 25-35 years • The higher an individuals peak bone mass, the longer it takes for age- and menopause-related bone losses to increase the risk of fracture. • Age 40 • Bone loss equivalent to a rate of 0.3-0.5 percent per year begins in both men and women. Menopause • The rate of bone loss can increase at a rate of 3-5%. Prevention • Adequate calcium intake and exercise. Bone Health and Osteoporosis “Porous bones” Bones easily fracture Gender differences Risk factors Condition is preventable “Pediatric disease” Osteoporosis Prevention/Treatment Meet daily calcium requirements Supplements Inexpensive calcium Vitamin B12 Avoid excessive protein intake Low fat dairy beverages Avoid carbonated beverages Weight bearing exercises Hormone-replacement therapy (HRT) Sodium Description • • • • Helps maintain proper fluid balance. Regulates blood pressure. Transmits muscle impulses. Relaxes muscles. Sodium Characteristics • Excess sodium is not a problem for most healthy individuals. • 30% of the population is saltsensitive and therefore too much sodium can contribute to high blood pressure. Sodium Dietary Recommendations • National Heart, Lung, and Blood Institute: <2,400 mg/day (1 teaspoon of table salt) • For Individual With High Blood Pressure: <1,500 mg/day Phytochemicals Description • Chemicals such as indoles, coumarins, and capsaicin, which exist naturally in plants and have disease fighting properties. Phytochemicals Benefits • Flavonoids: may decrease atherosclerotic plaque and DNA damage related to cancer development. • Associated with reduced risk of heart disease, certain cancers, age-related macular degeneration, adult-onset diabetes, stroke and other diseases. Vitamins/Minerals Recommendation Meet RDA Eat a Variety of foods Limit salt Implementation Eat recommended amounts from the ChooseMyPlate® guidelines. Color on plate Green, yellow, red and orange fruits/vegetables Avoid highly salted foods (crackers, chips, etc.) Vitamin and Mineral Supplements The following guidelines have been set forth by the Food and Drug Administration: 1. 2. 3. 4. Too many adults (40%) take nutrient supplements. Consumers of balanced diets do not need them. People should not take mega-doses of nutrients. Iron supplementation may be needed by women who are pregnant, lactating, or have heavy periods. 5. Those who may benefit from supplements include alcoholics, street-drug users, smokers, strict vegetarians, elderly, and newborn infants. 6. For healthy people with a balanced diet, most supplements do not seem to provide additional benefits. 7. Research has show that antioxidant supplementation is inferior to eating “natural foods”. The Old Version of the Healthy Eating Pyramid USDA Pyramid Podcasts Anatomy of the ChooseMyPlate® System 1. Variety 4. Activity 2. Proportionality 5. Personalization 3. Moderation 6. Gradual Change Themes Of USDA MyPlate® Balance Calories Foods to Increase Foods to Reduce • Enjoy your food, but eat less • Avoid oversized portions • Make half of plate fruits and vegetables • Make half of grains whole grains • Switch to fat-free or low-fat milk • Compare sodium in different foods and have those with lower numbers • Drink water instead of sugary drinks Dietary Diversity African-American Diet Chinese Diet French Diet Indian Diet Japanese Diet Mediterranean Diet Mexican Diet Southeast Asian Diet What are the pros and cons of each diet? You may view these diets on page 160 Quick and Easy Estimates of Portion Sizes 1 c cooked vegetables is about the size of your fist. 1 medium fruit is about the size of a baseball. 1/2 c ice cream is about the size of a racquet ball. 3 oz. of meat is about the size of a deck of cards. 1/4 c dried fruit is about the size of a golf ball. 1 1/2 oz. cheese is about the size of six stacked dice. 4 small cookies are about the size of 4 poker chips. 2 tbs. peanut butter is about the size of a marshmallow. Fig 6-6, p. 167 Nutrition Guidelines for All Americans 1. Aim for a healthy weight. 2. Be physically active each day. 3. Let the ChooseMyPlate.gov guide your food choices. 4. Choose a variety of grains daily, especially whole grains. 5. Choose a variety of fruits and vegetables (abundant in phytochemicals) daily. 6. Keep food safe to eat. 7. Choose a diet that is low in saturated fat and cholesterol and moderate in total fat. 8. Choose beverages and foods to moderate your intake of sugars. 9. Choose and prepare foods with less salt. 10. If you choose to drink alcoholic beverages, do so in moderation. Using the ChooseMyPlate® Food System to Eat Smarter Consume a Variety of Foods Consume a diet high in fruits and vegetables, whole grains, and nonfat or low-fat milk products. The greater the variety of colors and of foods you choose, the more likely you are to obtain the nutrients you need. Benefits: Reduced risk of chronic disease, and encourages a diet low in saturated fat, cholesterol, added sugars, trans fat, and sodium. Using the ChooseMyPlate® Food System to Eat Smarter Manage Your Weight Make it a point to expend as much energy as you take in. Limit portion sizes, substitute nutrient-rich foods for nutrient-poor foods, and limit added sugars, solid fats, and alcoholic beverages. Benefits: Reduced risk of those chronic diseases related to obesity. Using the ChooseMyPlate® Food System to Eat Smarter Get Physical Everyday For Overall Health Benefits: 30 minutes of moderate intensity exercise per day. Weight Gain Prevention: 60 minutes of moderate intensity exercise per day. Weight Loss Maintenance: 60-90 minutes of moderate intensity exercise per day. Children and Teenagers: 60 minutes of moderate intensity exercise per day. Benefits: Helps maintain a healthy weight and reduces the risk for several chronic diseases. Using the ChooseMyPlate® Food System to Eat Smarter Increase Foods from Certain Food Groups Consume 5-13 servings or 2 ½ to 6 ½ cups of fruits and vegetables each day. Benefits: May reduce the risk of stroke, certain cancers, and type 2 diabetes, and encourages a healthy weight. Consume 3 or more servings of whole grains each day. Benefits: Reduces the risk of diabetes, coronary heart disease, and aid in maintenance of a healthy weight. Consume at least 3 servings of milk, yogurt or cheese a day. Benefits: Reduced risk for high blood pressure, obesity, and osteoporosis Make Fruits and Vegetables Half of Your Plate Using the ChooseMyPlate® Food System to Eat Smarter Be Finicky About Fats Reduce your intake of saturated fat (<10% of total calories), trans fat (as low as possible), and cholesterol (<300 mg per day). Benefits: Can lower harmful LDL cholesterol and your risk of heart disease. Aim for two servings of fish high in omega-3 fatty acids each week. Benefits: Can boost heart health and reduce your risk of dying of heart disease. Using the ChooseMyPlate® Food System to Eat Smarter Choose Carbohydrates Wisely Get your carbohydrates by eating more fruits, vegetables, whole grains, and nonfat or low-fat milk and dairy products. Benefits: May reduce the risk of a variety of chronic diseases including obesity, type 2 diabetes and heart disease while promoting digestive health. Reduce your intake of added sugars. Benefits: Maintenance of a healthy weight and reduced risk of dental caries. Using the ChooseMyPlate® Food System to Eat Smarter Limit Salt Consume <2,300 mg of sodium per day, and increase potassium intake to at least 4,700 mg. Benefits: May lower your blood pressure and reduce your risk for stroke, heart disease, and kidney disease. Using the ChooseMyPlate® Food System to Eat Smarter If you drink alcoholic beverages, do so in moderation For most middle-aged and older adults, one to two drinks a day. Benefits: May lower the risk of dying, primarily because Disadvantages: Compared with nondrinkers, women moderate alcohol consumption protects against heart disease who consume one alcoholic beverage per day appear to have a slightly higher risk of breast cancer. For younger individuals, alcohol provides little, if any, health benefits and increases the risk of traumatic injury and death. Using the ChooseMyPlate® Food System to Eat Smarter Keep Food Safe to Eat Thoroughly wash hands and cutting boards. Separate raw, cooked, and ready-to-eat foods while shopping, preparing and storing. Cook foods to safe temperatures. Chill (refrigerate) perishable foods promptly. The name and address of the manufacturer, packer, or distributor The common or usual product name Approved nutrient claims if the product meets specified criteria The net contents in weight, measure, or count Approved health claims stated in terms of the total diet Understanding Food Labels The serving size and number of servings per container Calorie information and quantities of nutrients per serving, in actual amounts Quantities of nutrients as “% Daily Values” based on a 2,000-calorie energy intake Daily Values reminder for selected nutrients for a 2,000- and a 2,500-calorie diet Calories per gram reminder The ingredients in descending order of predominance by weight Don’t Be Mislead, Read Labels Carefully Figure 6.8 p. 176 Steps To Reduce Food-Borne Illness Wash hands before handling food Wash fruits and vegetables—discard outer leaves, wash under running water, scrub if possible Do not allow liquids to touch or drip onto other items Clean out refrigerator regularly Sterilize wet kitchen sponges by microwaving for 1-2 minutes In Summary… Making Healthy Food Choices Eat breakfast. Don’t eat too much of one thing. Eat more grains, fruits, and vegetables. Don’t label foods as “forbidden”. Make every calorie count. The End Slide Show developed by: Richard C. Krejci, Ph.D. Professor of Public Health Columbia College All Rights Reserved