Major Minerals
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Transcript of Major Minerals
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Nutrition Department – Faculty of Medicine University of North Sumatera
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Substances that occur naturally in nonliving things such as rocks and metal ores
Have names reflecting the place where they’re found or characteristics such as their color
ELEMENTS, substances composed of only one kind of atom
INORGANICS, do not contain the C, H and O atoms
By the end of the 19th century, scientists knew the names and chemical properties of 82 elements → Today, 109 elements have been identified.
16 MINERALS are ESSENTIAL NUTRIENTS for human beings
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1. MAJOR MINERALS, mineral essential at levels of 100 mg/day or more for adult humans
2. TRACE ELEMENTS
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-½ : Calcium
-¼ : Phosphorus
-¼ : Other Major Minerals : Magnesium, Sulfur, Sodium,
Potassium, Chloride
Trace Elements : Iron, Zinc, Iodide, Selenium, Copper,
Manganese, Fluoride, Chromium,
Molybdenum, Cobalt, Tin, Nickel ,
Vanadium and Silicon
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Work together
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If you get too much of this mineral
Your body may not be able to absorb or use this one
Ca
Cu
Fe
Mg
Mo
P
S
Zn
Mg, Fe, Zn
Zn
P, Zn
Fe
Zn, Cu
Ca
Mo
Cu
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Roles and function in the body◦ A constituents part of bones and teeth◦ Necessary for nerve conduction
(neurotransmitters) and muscle contraction (actin/myosin)
◦ Involved in the coagulation pathway◦ Active and inactive forms exist in the body are
affected by protein binding◦ A complex regulation system to maintain Ca
balance (vitamin D, phosphorus, PTH and calcitonin)
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Regulating fluid balance by controlling the flow of water in and out of cells
Making it possible for cells to send massages back and forth from one to another
Intracellular and hormone-like signaling The regulation of cell growth and differentiation Blood clotting
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Milk and dairy products Sardines Lactose, acidic foods and
fat in the diet increase Ca absorption
Phytates (nuts, seeds and grains) , Oxalates (beets, spinach and chocolate) and High fiber diets decrease Ca absorption
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AI for adults 19-50 years : 1.000 mg/day AI for > 51 years : 1.500 mg/day Increases Ca requirements → preventing the
development of osteoporosis and osteopenia
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Associated with Potassium and Magnesium Deficiency
Development of tetany symptoms
Bone demineralization and relaxed nerve and muscle coordination
Osteoporosis
Excessive intake (> 2.500 mg/day) → kidney stone formation
Associated with constipation
Interfere with absorption other minerals
Milk alkali syndrome
Development of hypercalcemic crisis
Deficiency Ca : Excess Ca :
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Structural component of bones, teeth and phospholipids
Involved in the synthesis DNA and RNA A coenzyme in many chemical reactions Participates in the buffer systems Has an inverse relationship with Ca in the
body
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Need PHOSPHORUS to transmit the genetic code (genes and chromosomes that carry information about human characteristic) from one cell to another when cells divide and reproduce
Helps maintain the pH balance
Vital for metabolizing carbohydrates, synthesizing proteins, and ferrying fats and fatty acids among tissue and organs
Part of myelin, the fatty sheath that surrounds and protects each nerve cell
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Dietary sources ◦ High amounts in dairy and meat products◦ Processed foods (as an additive)
Recommendations for Phosphorus◦ RDA for male and female adults : 700 mg/day◦ UL for 19-70 years : 4.000 mg/hari
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Deficiency states of Phosporus◦ Associated with bone loss and muscle weakness◦ High levels of Ca → low levels of Phosphorus◦ People at risk : hyperparathyroidism, refeeding
syndrome, malnourished clients who are started enteral or TPN feedings
Excess states◦ Associated with low serum Ca levels◦ People who chronically use sodium phosphate
laxatives
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Found mainly in the bones in the body Reported to be nature’s Ca channel blocker A coenzyme in energy metabolism and a
neurotransmitter in the central nervous system
Mg and Ca act to regulate blood pressure and blood clotting
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Sunflowers seeds, legumes and dark green leafy vegetable
Chocolate, cocoa, nuts, seafood and whole grain breads and cereals
Mg absorption increased with active form vitamin D
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RDA for adults males : 400 – 429 mg/day (ages 19-31)
RDA for adults females : 310 – 320 mg/day (ages 19-31)
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Clinical manifestations : muscle weakness, mental status changes
Decreased absorption occur when there is a high intake of fat, phosphorus, Ca and protein
Decreased Mg levels :◦ People who have malabsorption problems◦ Chronic alcohol abuse◦ Chronic use of laxative products◦ Rapid refeeding to treat malnutrition
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Involved in fluid balance (osmolality) ~ADH and aldosterone secretion
Nerve transmission and neurological function
A cerebral celluler response to Na → responds by shrinkage or edema formation
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Animal foods and sodium salt High concentrations in processed or
prepared foods Used as preservative or flavoring agents in
food products Hidden sources found in medication
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Deficiency states ◦ Hyponatremia and Syndrome of Inappropriate
Antidiuretic Hormone/SIADH◦ Symptoms : nausea, vomiting, diarrhea, muscle
cramps and mental status changes
Excess states◦ Hypernatremia◦ The development of edema and hypertension
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Involved in fluid balance and acid-base balance
Moves across the cell to membrane to interact with Potassium
Help maintain gastric acidity
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Deficiency state of Cl◦ Losses occur through the GI tract → dehydration
and acid-base imbalance
Excess state◦ Associated with vomiting
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Important in nerve transmission and muscle contraction
Helps to maintain acid-base balance by transcellular shifting
Affects to cardiac muscle
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Cooked dried beans, potatoes, apricots, bananas and oranges
Found in large quantities in most fresh foods
Large amount of licorice → hypokalemia and sodium water retention
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Deficiency state◦ Deficiency Mg and Ca◦ Deficiency K arise from use certain medications
that promote K+ excretion (diuretics, laxatives and steroids)
Excess state◦ Potassium supplements◦ ACE inhibitors and potassium-sparing diuretics
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A constituents of 3 amino acids : CYSTINE, CYSTEINE, THIONINE
Most prevalent in insulin and in the keratin of skin, hair and nails
The tertiary structure of proteins is due in part to covalent bonding between cysteine residues where the –SH groups are oxidized to form disulfide bridges → important in the activity of some enzyme
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Occurs in carbohydrate ~ a component of heparin (an anticoagulant found in liver and some other tissues), and of chondroitin sulfate (found in bone and cartilage)
An essential component of 3 vitamins : thiamin, biotin and pantothenic acid
Food Sources :meat, poultry, fish, eggs, dried beans, broccoli and cauliflower
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