Chapter 12 Nutrition Through the Lifespan: Later Adulthood © 2007 Thomson - Wadsworth Nutrition & Longevity • Past food choices influence longevity • U.S. population is graying • People over 85 are the fastestgrowing age group © 2007 Thomson - Wadsworth Aging of U.S. Population • Life expectancy 1900 = 47 years 2006 = 77 years • Due to advances in medical science & improved nutrition • Upper limit of longevity is 130 years • Study of aging is the youngest scientific discipline • Aging 20-30% genetic 70-80% lifestyle © 2007 Thomson - Wadsworth Slowing the Aging Process • Healthy habits Adequate sleep Well-balanced meals Healthy weight Physical activity Not smoking Moderate alcohol • Restriction of kcalories 80% of usual intake may decrease body weight, body fat, & blood pressure, & increase HDL cholesterol Eat fruits, vegetables, whole grains, & legumes © 2007 Thomson - Wadsworth Physical Activity • A powerful predictor of mobility in later years • Promotes healthy weight, flexibility, endurance, & balance • Tones, firms, & strengthens muscles • Should be undertaken daily © 2007 Thomson - Wadsworth Adequate Nutrition & Disease Prevention • Helps prevent obesity, diabetes, & cardiovascular disease • Prevents deficiency diseases • Variety may protect against some cancers • Moderate sugar prevents dental caries • Fiber helps prevent constipation & diverticulosis • Moderate sodium may prevent hypertension • Adequate calcium protects against osteoporosis © 2007 Thomson - Wadsworth Nutrition-Related Concerns • Cataracts Age-related thickening of the lens of the eye Can lead to blindness Risk factors: oxidative stress & obesity • Macular Degeneration Leading cause of blindness in persons over 65 Risk factor: oxidative stress from sunlight Omega-3 fatty acids may be protective © 2007 Thomson - Wadsworth Arthritis • Osteoarthritis • Rheumatoid arthritis Most common Painful swelling of joints Interventions Immune system attacks bone coverings Interventions • Weight loss • Aerobic activity • Weight training © 2007 Thomson - Wadsworth • • • • Vegetables Olive oil Omega-3 fatty acids Low saturated fat The Aging Brain • Blood supply decreases • Number of neurons diminishes Cerebral cortex: affects hearing & speech Hindbrain: affects balance & posture © 2007 Thomson - Wadsworth Aging Brain • Nutrient deficiencies Need vitamins & minerals for neurotransmitter functioning Some losses may be diet related © 2007 Thomson - Wadsworth Alzheimer’s Disease • Most prevalent form of senile dementia • Gradually lose Memory & reasoning Ability to communicate Physical capabilities Life itself • Risk factors Free radicals Elevated blood homocysteine Low blood folate, B6 & B12 • No cure • Need to maintain appropriate weight © 2007 Thomson - Wadsworth © 2007 Thomson - Wadsworth Energy & Nutrient Need • DRI categories 51-70 years old 71 and older • Standards are difficult to set for older adults © 2007 Thomson - Wadsworth Energy & Nutrient Needs • Energy needs decline with aging 5% per decade Lean body mass diminishes BMR slows Select nutrient-dense foods • Sarcopenia Loss of muscle mass © 2007 Thomson - Wadsworth © 2007 Thomson - Wadsworth Nutrients • Protein • Carbohydrate Needs are about the same as younger adults Need low-kcalorie, high-quality • Fat Moderate amounts Need abundant amounts to spare protein Whole grains • Fiber Needed to prevent constipation © 2007 Thomson - Wadsworth Water • Total body water decreases with age • Dehydration is a risk • Do not seem to feel thirsty or notice mouth dryness • Amount needed Women 9 cups/day Men 13 cups/day • Dehydration can promote Urinary tract infections Pneumonia Pressure ulcers Confusion Disorientation © 2007 Thomson - Wadsworth Vitamins • Vitamin D deficiency • Vitamin B12 deficiency Drink little milk Limited exposure to sunlight Capacity of skin & kidneys to produce active vitamin D is decreased Stomach acid decreases Atrophic gastritis • Malabsorption of B12 • Folate Medical conditions & medications can compromise status © 2007 Thomson - Wadsworth Minerals • Iron Anemia less common than in younger adults Deficiency • Chronic blood loss • Poor absorption • Zinc Commonly low Can depress appetite • Calcium Needed throughout life to prevent osteoporosis Calcium AI for late adulthood = 1200 mg/day © 2007 Thomson - Wadsworth Other Concerns • Supplements • Effects of Drugs Food is the best source of nutrients A balanced lowdose vitamin & mineral supplement may be advised As people age,the number of drugs seems to increase Medications interact with nutrients Most common drug is alcohol © 2007 Thomson - Wadsworth Food Choices & Eating Habits • Most older people are Independent Socially sophisticated Mentally lucid Fully participating members of society • Spend more money per person on foods to eat at home • Need easy-toopen, singleserving packages with easy-to-read labels © 2007 Thomson - Wadsworth Eating Habits • Individual preferences are important for older adults • Meal Setting Need companions Men living alone are at risk for malnutrition © 2007 Thomson - Wadsworth Other • Depression • Risk factors for malnutrition More common with advancing age Affects food intake & appetite Many losses Feel powerless Disease Eating poorly Tooth loss Economic hardship Reduced social contact Multiple medications Involuntary weight loss Need assistance with self-care Elderly older than 80 © 2007 Thomson - Wadsworth Nutrition for Older Adults • Food assistance programs Older Americans Act (OAA) Nutrition Program Food Stamps Meals on Wheels Senior Farmers Market Nutrition Program • Meals for singles May not have storage for a lot of food Food may go bad before eaten May have limited income Need to be creative & choose wisely © 2007 Thomson - Wadsworth