HUN 3403 Lecture 25: Aging 2

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University of Florida
Food Science and Human Nutrition
HUN 3403
Langkamp- Henken

Aging Lecture #2 April 13, 2017  Nutrient needs o Energy needs decrease with age o Same EER equations as adults  Age and activity levels adjust for decrease o Some nutrient requirements increase with age o Need nutrient dense foods o Protein  RDA = 0.8g/kg  Reflects needs for healthy individuals  Additional required for  Chronic disease  Inflammation and infection o Vitamin D  Decreased synthesis  Decreased exposure to sunlight especially in winter  Ca obtained from supplements not milk  Medications interfere with metabolism  Risk of deficiency  RDAs  71+ = 800 IU per day  51-70 = 600 IU  31-50 = 600 IU o Vitamin B6  Medications may interfere with absorption  Decreased use of meats  May not have money for  May not have teeth to chew  RDA increases with age o Folate  Reduced dietary intake  Decreased absorption o Vitamin B12  Achlorhydria  Poor dietary intake of synthetic form  Loss of intrinsic factor  Absorbed in ilium  Get RDA from fortified foods or supplements  Vitamin A  Overdoes more likely which can lead to liver damage  Decreased clearance of retinyl esters by kidney o Minerals- reduced absorption  Ca  Tend to be deficient in vitamin D  Fe  Zn  Mg  Even if intake is adequate, that doesn’t mean that adequate amount is absorbed o Water  Decreased sensation of thirst  Difficulty swallowing  Incontinence  Decreased conservation by the kidney  Mobility limits desire to drink  1mL/kcal (1500mL minimum)  AI o Males 19-70 yo = 3700mL per day o Females 19-70 yo = 2700mL per day o Fiber  Males > 70 yo = 30 g per day  Females > 70 yo = 21 g per day  Nutritional health o Overview of intake  High rates of obesity  Significant hunger and malnutrition o At risk of low protein intake  Living alone  Living in poverty  Functional limitations o At risk for low intake  Vitamins A D E  K, Ca, Mg, Choline  Fiber  Dietary supplements o Not shown to have a preventative benefit in well-nourished aged adults o May benefit those with  Lack of appétit due to illness, loss of taste or smell  Depression  Diseases or bacterial overgrowth in GI tract to prevent absorption  Poor diet  Avoidance of certain food groups  Use of substances that alter needs  Health issues o Leading causes of death  Heart disease
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