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“Protein Deficiency and Excess”
Results of too little, too much
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PEM “Most widespread form of malnutrition: PEM” “Protein-Energy Malnutrition” Over 500 million children currently suffer Most of 33,000 children who die each day are malnourished
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Where is it prevalent? Africa, Central America, South America, Middle East, East and Southeast Asia Can occur here too!
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What happens when we don’t get enough protein?
“Inadequate protein intake leads to:” “poor growth” “weight loss” “wasting” (consumption of muscle) Stunted growth is easy to overlook!
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Old-School Thought Used to think small stature in poor countries was an adaptation to limited food We now know it’s a failure of growth due to lack of food in growing years
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Sometimes patients show signs of both.
“Two Forms of PEM” Marasmus Shriveled all over Kwashiorkor Swollen belly Sometimes patients show signs of both.
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“1. Marasmus” “Most common in 6-18 month old children” The most available food in city slums in a weak cereal drink with little energy or protein “Child is skin and bones”
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“Muscles incl. heart weaken”
“Brain development stunts” “Body temp is subnormal” (because of slow metabolism) Little or no fat insulation; patients need to be wrapped in blankets Often also starved of parental attention and need love from hospital staff
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What happens when your body has little energy?
Body cuts nonvital activities “Child will not even cry for food; energy is spent on vital organs” Skin loses moisture and cracks; sores don’t heal
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Disease Conditions “Body stops producing blood proteins and antibodies” So child is anemic and susceptible to infection
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“Dysentery: infection of digestive tract, causes chronic diarrhea”
What is the major problem with diarrhea? Deprives body of water and nutrients, causes electrolyte imbalances Infections responsible for two-thirds of deaths
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“Preventing Death” “Reverse with careful nutrition therapy” Fluid balances are delicate, and electrolytes must be restored Then fat-free milk Then fat Deficits in thinking occur for years
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“2. Kwashiorkor” “Ghanian for ‘the evil spirit that infects the first child when the second is born.’” There is a good reason why they believe this!
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In these countries… Babies are born frequently As soon as second is born, first is weaned from breast milk Older baby receives watery cereal instead First baby suffers
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Why the swollen belly? “Proteins that maintained fluid balance are gone” “Fluid leaks out of blood, accumulates in belly and legs (edema)”
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“Proteins stop taking fat from liver; liver swells”
Protein loss also deprives skin and hair of melanin Skin is patchy and scaly
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“PEM in the U.S.” Most common among:
The poor in Native American reservations Inner cities Rural areas Elderly and uncared for Hungry and homeless children Patients suffering from anorexia
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“Occasionally caused by replacing milk or formula with unenriched health-food soy or rice drinks”
Also sufferers of AIDS, cancer Drug or alcohol addicts “PEM and other disorders worsen each other.” Causing a downward spiral.
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Poverty in America Tens of millions of Americans can’t afford a steady supply of nutritious food “14 million U.S. children are hungry.” What impacts does this have?
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Hungry Children: Do not learn as well Are less competitive Are ill more often Have higher absentee rates Cannot concentrate when they are in school
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What about “Too Much Protein”?
“No benefits, health risks for weakened kidneys” Consumption of protein crowds out room in the diet for fruits, veggies, and whole grains!
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Heart Disease “Foods rich in protein can also be rich in saturated fats” Especially red meat and dairy: greater risk of heart disease
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Substituting vegetable protein for animal protein does lower the risk of heart disease!
“Current study: link between protein, homocysteine aa, and heart disease” Unknown whether heart disease causes homocysteine to rise or vice versa.
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Kidney Disease In animals, raising protein in diet can cause enlarged kidneys or livers “In humans, high-protein doesn’t seem to damage kidneys, but can speed decline”
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Adult Bone Loss “Give patient increased dose of purified protein, they spill more calcium out of body” This means that high-protein may cause or worsen osteoporosis! “May not be true of whole food protein.”
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Cancer “Red meats and processed meats increase risk for colon and rectal cancer” Plus, hot dogs, sausages, deli meat, and bacon contain high amounts of saturated fat and salt.
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