chapter 14: nutrition from infancy through adolescence
TRANSCRIPT
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Chapter 14: Nutrition from Infancy Through Adolescence
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Child Health
More children are receiving vaccinations
Fewer teenage pregnancies
Lower poverty rate
Increase number of obesity
Increase number of Type 2 diabetes
Decrease physical activity
Increase in consumption of sodas
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Infant Growth and Development
Rapid growth rate
Weight doubles by 4-6 month of age
Weight triples by 1 year
Length increases 50% by the end of the 1st year
Nutrients needed to support proper growth
Inadequate nutrition (including fat) can inhibit growth
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Effects of Undernutrition
More prevalent in developing countries
Smaller in size
Growth is an indicator of nutritional status
Following an adequate diet later won’t compensate for lost growth
WIC program
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Assessment of Growth
Growth charts
Height and weight correspond to a percentile
50th percentile is considered average
Brain growth (fastest in infancy)
Over-feeding may increase the number of adipose cells
Restriction may affect organ development
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Failure to Thrive
Usually due to poor parent-infant interaction
Infants need physical contact & eye contact
Diet restriction not recommended
Infants are dependent on others for nutrition
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Infant’s Nutritional Needs
Human milk or formula for the first yearSupplemented with solid food at 4-6 month of ageHigh energy needsHigh protein needsHigher fat needsVitamin K given at birthVitamin D or sunshineVitamin B-12 if mom is a vegan
All can be met by feeding infant with human milk or formula
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Calorie Needs
45-50 kcal per pound of body weight
~700 kcal/day for a 6 month old child
Breast milk or formula is ideal
High energy needs due to rapid growth & metabolism rate
Lose more heat from the skin due to higher body surface area
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Protein Needs
0.7 – 1.0 g protein / pound (1.6-2.2 g/kg)
Half should be from essential amino acids
Breast milk or formula is ideal
Total protein should not exceed 20% of total energy needs
Excess nitrogen and minerals exceed the infant’s immature kidney abilities
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Fat Needs
Under the age of 2, fat can provide 40% of total energy needs
More than 50% may lead to poor fat digestion
Half of the energy supplied by breast milk & formula comes from fat
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Vitamin K
Routinely given as an injection
Intestinal bacteria will begin to synthesize
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Mineral Needs
Iron store depleted by 4-6 month of ageChange to iron-fortified formula for bottle fed infantsPossible iron supplementation for breastfed infantsIntroduction of iron-fortified solid foods Zinc and iodide supplied by breast milk or formulaFluoride supplement after 6 month of age for tooth development
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Water for Babies?2 oz/pound of body weight/dayMost fluid needs are met via breast milk or formulaSupplemental water may be necessary in hot climateDiarrhea, vomiting will require additional fluidsBabies are easily dehydrated and can damage kidneysUnder normal condition, additional water is not necessary
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Formula Feeding
Cow’s milk is not tolerated by infants
Formulas must follow strict guidelines
Soy base contains soy protein
Fortified with vitamins and minerals
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Feeding Skills
Grasps & transfers objects by 6-7 months
Holds bottle, play with food by 7-8 months
Self-feeding & drink from a cup around 10 months
More independence
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When Should Solids Be Introduced?
Reached 13 pounds
Drinks 32+ oz a day (or 8-10+ breastfeeding/day)
Introduce solids at ~6 month of age
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First Foods
Iron-fortified cereals--rice cereal Introduce one food at a timeWait a week before introducing a new foodStrained foods & meatsIntroduce vegetable before fruitDo not introduce mixed foodOffer juice in a sippy cup (prevent early childhood caries)No cow’s milk until 1 year of age
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What NOT To Feed An Infant
Allergenic foods
Honey or corn syrup (contains Clostridium botulinum)
Highly seasoned foods
Excessive formula or breast milk
Choking potential foods
Cow’s milk
Excessive apple or pear juice
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Limit Highly Allergenic Foods
Egg whites
Chocolate
Nuts
Cow’s milk
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Key to Feeding Infants
Patience
Patience
PatiencePatience
Patience
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Guidelines For Infant Feeding
Build to a variety of foodsPay attention to infant’s appetite to avoid overfeedingInfant needs fatChoose fruits, vegetables, grains but limit high-fiber foodsSugar in moderationSodium in moderationChoose foods containing iron, zinc, and calcium
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Common Infant Health Problem: Colic
Repeated crying spell lasted 3 or more hoursAffects 10%-30% of all infantsUsually goes away in a few monthsNo physical problem identified with the infantAssociated with digestive problemsChange formula, or avoid certain foods if breastfeeding
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DiarrheaNumerous loose stools in a dayRisk for dehydrationInfant needs additional fluidsElectrolytes-replacement fluids may be recommendedMay switch to soy-based formula for a few daysContinue to breastfeed
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Milk Allergy
Cow’s milk contains 40+ different proteins that can cause allergic reactionsCauses vomiting, diarrhea, blood in the stool, constipationSwitch to soy base, or pre-digested protein formulaMay want to limit cow’s milk from breastfeeding mom
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Iron-Deficiency Anemia
Occurs in older infants consuming too few solid foods
Cow’s milk is a poor source of iron
Feed iron-fortified formula
Feed iron-fortified cereals/meats
May need iron supplement
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Preschool Children (age 2 - 5)
Average weight gain 4.5 - 6.6 lb. per year
Average height gain is 3-4 inches per year
Tapering of growth rate*
Reduction in appetite*
Promote good eating habits
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Encouraging Nutritious Foods
Serve new foods & repeat exposure
Preschooler has sensitive taste buds & avoid new foods
Prefers crisp texture and mild flavor
Parents/caregivers must teach by example
Make meal time a happy time
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Food Guide Pyramid for Children
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Feeding Problems
Tension between parents and/or children
High expectations from parents
Change in appetite
Six small meals vs. 3 bigger meals
Foster good eating habits with good food choices
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Not Eating As Much
Drop in growth rate
Loss of appetite
Typical serving size =
1 tablespoon per year old
Built-in feeding mechanism in normal weight children
Avoid nagging, forcing, bribing
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Always Snacking and Never Finishes a Meal
Six small meals vs. three large meals
Smaller stomach capacity
Offers nutritious snacks
Do not overreactMeans of getting attention
Children will never starve themselves
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Never Eats Vegetables
Introduce one at a time & repeatedly
Raw or blanched may be better tolerated
Serve with nutritious dip
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Is He Eating Healthfully?
Compare to Food Guide Pyramid
Vitamin and mineral supplements are not necessary
Focus on good food choices
Use of fortified cereals
Foods with iron and zinc
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Nutritional Problems in Preschoolers
Iron-deficient anemiaPoor oxygen supply to cellsCompromised learning abilitiesLower resistance to disease Iron-fortified cereals, lean meatsWIC
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School-Age Children
Breakfast More likely to meet their nutritional needs
School lunch programs Fat content to decrease to 30% of total energy
Overemphasis of low-fat diets is linked to eating disorder
Need for nutrition education to promote wise food choices
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Type 2 Diabetes
Alarming increase in the frequency in childrenRise in obesity & drop in physical activityScreening for at-risk childrenFamily historyEthnicityEncourage intake of low glycemic index foods
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Obesity
25-30% of school-age are overweight
~40% of obese children become obese adults
~80% of obese adolescents become obese adults
Health threat
Encourage physical activity daily (>60 min./day)
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Obesity
~34 hours a week spent in front of a TV, video game, or computer
Moderate kcal intake
Limit high fat foods
Weight loss diet may not be necessary
Obesity and self esteem
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The Teenager
Rapid growth spurt between age 10-13 in girls*Rapid growth spurt between age 12-15 in boys*Girls gain ~10 inches Boys gain ~12 inchesGirls gain fat & lean tissueIncrease in appetitePeer pressure
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Nutritional Problems of Teens
Anorexia nervosa and bulimia nervosa
Poor food choices
High fat intake
High sodium intake
Lack of calcium rich foods
Iron-deficiency anemia
No link between food & acne
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Diets of Teenage Girls
Adoption of fad dietsDesire social acceptance; fat phobiaIncrease meals away from homeMissed mealsLimited food choicesIncrease snacking44% are trying to lose weightDiet commonly low in iron, calcium, zinc, vitamins folate, A and C
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Get Teens to Eat Right!
Teens are unaware of long-term affect on healthRecommend smaller portions of high fat/sugar foodsLarger servings of low-fat dairy, lean meats, vegetables, fruits, and grainsStress the importance of nutrition & physical fitness
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Snacking and Teens
1/4-1/3 of energy needs met by snackingSnack mostly on chips, candies, cola, ice cream“Snacking for socialization reason, not hunger”Poor dietary habits will continue into adulthoodIncreased risk for chronic diseases