Presentation on theme: "The 2005 Dietary Guidelines for Americans Benjamin Caballero, MD, PhD Center for Human Nutrition."— Presentation transcript:
The 2005 Dietary Guidelines for Americans Benjamin Caballero, MD, PhD Center for Human Nutrition
History of Dietary Guidelines 1977 Dietary Goals for the U.S. (Senate) 1979 Healthy People Surgeon General’s Report (HHS) 1980 First Edition of Dietary Guidelines (HHS and USDA)
1980 1985 1990 1995
Dietary Guidelines For Americans Science-based advice for ages 2+ (gold standard) –Promote health –Prevent chronic disease Federal nutrition policy/programs Vehicle to speak with one voice Jointly developed by HHS/USDA
What the Guidelines Do Provide dietary advice to consumers Set policy for food assistance programs (e.g., school lunches, elderly nutrition) Establish overarching goals for National health objectives Nutrition monitoring Nutrition research Set framework for standards in Food labeling/ fortification Food product development
Legislated Mandate for the DGA National Nutrition Monitoring and Related Research Act of 1990 Dietary guidelines must be issued every 5 years Dietary guidance issued by the Federal government for the general public is to be reviewed by the Secretaries of Agriculture, and Health and Human Services. (Departments alternate the lead role.)
2005 DGA Committee Janet King, PhD, RD (Chair) Children’s Hospital Oakland Research Institute, Oakland, CA Lawrence J. Appel, MD, MPH Johns Hopkins Medical Institutions, Baltimore, MD Yvonne L. Bronner, ScD, RD, LD Morgan State University, Baltimore, MD Benjamin Caballero, MD, PhD Johns Hopkins University Bloomberg School of Public Health, Baltimore, MD Carlos A. Camargo, MD, DrPH Harvard University, Boston, MA Fergus M. Clydesdale, PhD, University of Massachusetts, Amherst, Amherst, MA Vay Liang W. Go, MD University of California at Los Angeles, Los Angeles, CA Penny M. Kris-Etherton, PhD, RD Penn State University, University Park, PA Joanne R. Lupton, PhD Texas A&M University, College Station, TX Theresa A. Nicklas, DrPH, MPH, LN Baylor College of Medicine, Houston, TX Russell R. Pate, PhD University of South Carolina, Columbia, SC F. Xavier Pi-Sunyer, MD, MPH Columbia University College of Physicians and Surgeons, New York, NY Connie M. Weaver, PhD Purdue University, West Lafayette, IN
Systematic Review of Scientific Literature Identification of research questions Questions were prioritized by: –Publication/availability of recent systematic reviews by an authoritative source (e.g. IOM, CDC, NIH) –Preliminary literature search to determine if there were enough data (from peer-reviewed sources) to examine the research question Iterative process
Systematic Review of Scientific Literature All literature examined was peer-reviewed Human studies were primary focus Committee assessed study quality and the strength of the evidence Priority was given to: – trials with well-accepted, clinically relevant outcomes (e.g., incidence of cancer and myocardial infarction) and well-accepted risk factors (e.g., systolic blood pressure, low-density lipoprotein cholesterol, and weight) –longitudinal, cohort studies
Opportunities for Public Comments Over 400 public comments submitted to the Committee Written comments were accepted throughout the Committee’s deliberations Oral presentations were made at the January 2004 meeting
Content of Science Base Aiming to Meet Nutrient Intake Recommendations Energy Discretionary Calories Fats Carbohydrates Selected Food Groups Fluid and Electrolytes Ethanol Food Safety
Key Scientific Recommendations 1.Consume a variety of foods within and among the basic food groups while staying within energy needs 2.Control calorie intake to manage body weight 3.Be physically active every day 4.Increase daily intake of fruits and vegetables, whole grains, and reduced-fat milk and milk products 5.Choose fats wisely for good health 6.Choose carbohydrates wisely for good health 7.Choose and prepare foods with little salt 8.If you drink alcoholic beverages, do so in moderation 9.Keep food safe to eat
Nutrient Adequacy Basic food groups: –Fruits –Vegetables –Grains –Milk, yogurt and cheese –Meat, poultry, fish, dry beans, eggs, and nuts Consume a variety of foods within and among the basic food groups, while staying within energy needs.
Nutrient Adequacy Nutrient-dense foods are those that provide substantial amounts of vitamins and minerals in relatively few calories. Foods of low nutrient density are those that supply calories but little or no amounts of vitamins and minerals. The greater the consumption of foods or beverages that are low in nutrient density, the more difficult it is to consume enough nutrients without gaining weight, especially for sedentary individuals. The consumption of added sugars, solid fats, and alcohol provides calories while providing little, if any, essential nutrients. Nutrient Density
Nutrient Adequacy Adults do not consume enough vitamins A, C, and E; calcium; magnesium; potassium; and fiber. Children do not consume enough vitamin E, calcium, magnesium, potassium, and fiber. At the same time, in general, Americans consume too many calories and too much saturated and trans fat, cholesterol, added sugars, and salt. Nutrient Intake
Nutrient Adequacy Iron: For adolescent females and women of childbearing age Folic Acid: For women capable of becoming pregnant and in the first trimester of pregnancy Vitamin B12: For those over age 50 Vitamin D: For the elderly, persons with dark skin, and persons exposed to insufficient UVB radiation Special Groups
Energy Balance Discretionary calories: = Total estimated daily energy requirement minus essential calories. To make discretionary calories available or to increase their amount, individuals need to –increase their physical activity AND/OR –consume nutrient-rich foods that are relatively low in energy density.
Energy Balance Most Americans need to reduce the calories they consume. For weight control, calories do count—not proportions of carbohydrate, fat, and protein. The healthiest way to reduce calorie intake is to reduce intake of added sugars, solid fat, and alcohol—they all provide calories, but they do not provide essential nutrients. Controlling portion sizes helps limit calorie intake, especially when eating energy-dense foods. For most people, a reduction of 50 to 100 calories per day will prevent weight gain. Control calorie intake to manage body weight
Physical Activity and Health Adults: Thirty minutes of at least moderate physical activity on most days provide important health benefits and reduces the risk of chronic disease. More than 30 minutes of moderate to vigorous physical activity on most days provide even more health benefits. Participating in up to 60 minutes of moderate to vigorous physical activity on most days is recommended to prevent unhealthy weight gain. After losing weight, adults who perform 60 to 90 minutes of moderate physical activity daily are more successful at maintaining their reduced weight than those who rely only on limiting calorie intake. Be physically active every day
Physical Activity and Health Children and Adolescents: At least 60 minutes of moderate to vigorous physical activity on most days to maintain good health and fitness and for healthy weight during growth. Increasing physical activity can lower the BMI of overweight children During leisure time, it is advisable for all individuals to limit sedentary behaviors, such as television watching and video viewing, and replace them with activities that require more movement. Be physically active every day
Physical Activity Exercise that loads the skeleton has potential to reduce the risk of osteoporosis. Resistance training (8 to 10 exercises twice or more per week) increases muscular strength and endurance and maintains or increases lean body weight. Additional Health Benefits:
Fats and Fatty Acids Total fat: 20% and 35% of energy for adults Intakes as low as possible of: –Saturated fats: Less than 10% of calories –Trans fats: About 1% of calories or less –Cholesterol: Less than 300 mg of cholesterol per day Choose fats wisely for good health.
Fatty Acids Consuming two servings of fish per week (approximately 8 ounces total) may reduce the risks from cardiovascular disease, especially mortality from coronary heart disease. Other sources of EPA and DHA may provide similar benefits; however, more research is needed. Omega-3 fatty acids NOTE: Caution for pregnant or lactating women and children to avoid fish with high mercury content.
Carbohydrates Choose carbohydrates wisely for good health. Total carbohydrates: Intake 45% to 65% of energy Dietary Fiber: Intake 14 grams per 1000 calories. Added Sugars: Reducing intake of added sugars (especially sugar-sweetened beverages) can lower calorie intake, and may be helpful in achieving recommended nutrient intakes and weight control. Dental caries: Reducing frequency of consuming sugars and starches and optimizing oral hygiene practices is advised Glycemic index/load: Few advantages in using these for dietary guidance
Selected Food Groups Increase daily intakes of fruits and vegetables, whole grains, and reduced-fat milk and milk products. Fruits and Vegetables: At 2000 kcal/day, 9 servings (4 ½ cups) Whole Grains: At least three servings (3 ounces) per day Milk: At 1600 kcal/day or more, 3 cups of non-fat or low-fat milk or the equivalent
Sodium and Potassium Choose and prepare foods with little salt. Nearly all Americans consume substantially more salt than they need. The general goal for adults is to consume less than 2,300 mg of sodium per day. Many persons will benefit from reducing salt intake even more. At the same time, individuals are encouraged to increase their consumption of foods rich in potassium. Potassium lowers blood pressure and blunts the effects of salt on blood pressure. Increasing potassium to at least 4,700 mg daily is advised.
Alcohol If you drink alcoholic beverages, do so in moderation. Moderation is up to one drink per day for women and up to two drinks per day for men. One drink is defined as 12 ounces of regular beer, 5 ounces of wine (12 percent alcohol), or 1.5 ounces of 80-proof distilled spirits. Drinking alcoholic beverages should be avoided before or when driving, or whenever it puts anyone at risk. Studies suggest adverse effects even at moderate alcohol consumption levels in specific individuals and situations.
Food Safety Keep food safe to eat. Behaviors in the home most likely to prevent microbial foodborne illnesses: Clean, Separate, Cook, Chill –Cleaning hands, contact surfaces, and fruits and vegetables (but not meat and poultry, which should not be washed) –Separating raw, cooked, and ready-to-eat foods while shopping, preparing, or storing. –Cooking foods to a safe temperature. –Chilling (refrigerating) perishable foods promptly.
Food Safety An important protective measure against foodborne illness is avoiding higher-risk foods. In the case of listeriosis, high-risk groups such as the very young, pregnant women, the elderly and those who are immunocompromised, should avoid higher-risk foods (e.g. frankfurters and deli meats which have not been heated to a safe temperature).
% change in current intake needed to meet the 2005 DG - Main food groups
% change in current intake needed to meet the 2005 DG - Subgroups, solid fats and added sugars