Magnesium mg 1 functions required in 300 enzyme

  • No School
  • AA 1
  • 11

This preview shows page 5 - 9 out of 11 pages.

Magnesium (Mg) 1. Functions Required in > 300 enzyme -catalyzed reactions in body DNA, RNA synthesis Bone structure - 50-60% of Mg is found in bone Nerve, heart function Insulin action 2. Dietary Sources Plant products Animal products Hard tap water 3. Deficiencies Hypomagnesemia Symptoms At risk o Users of diuretics o o Alcoholics o Diabetics NHANES: 4. Toxicities Rare from diet UL = 350 mg/d (not food/water; pharmacologic agent only) Seen in kidney failure Toxicity from E. Sulfur (S) Component of protein Present in Deficiency Toxicity IV. Minerals with Roles in Fluid Balance in the Body
Image of page 5

Subscribe to view the full document.

A. General properties Electrolytes” : Maintain Transmit Muscle contraction Transport B. Sodium (Na) 1. Major positively charged ion in extracellular fluids 2. Functions Regulating Regulating Transmitting Contracting Helping nutrient transport 3. Sodium consumption AI = 1,500 mg/day Foods Sources- UL for adults = Overconsumption can lead to C. Potassium (K) 1. Primary electrolyte within cells 2. Functions Regulating fluid balance Acting as a cofactor for certain enzymes Helping nutrient transport Transmit nerves; including those in the heart 3. Dietary Sources 4. Deficiency Mild forms Severe depletion causes hypokalemia Usually from excessive fluid loss thru vomiting, diarrhea, use of diuretics, or kidney disorders
Image of page 6
Increased calcium excretion Reduced insulin production 5. Toxicity Diet- harmless with normal kidneys No UL set Hyperkalemia Symptoms Supplementation should D. Chloride (Cl) Half of the mineral of Found primarily in extracellular fluids Involved in Half Abundant in the diet with Overconsumption UL = 3600 mg V. Trace Minerals A. Iodine (I) 1. Goiter Belt 2. Recommendations & Sources RDA= 150 µg/day US salt Co. began to add iodine to salt Sources of iodine 3. Functions
Image of page 7

Subscribe to view the full document.

4. Deficiency Hypothyroidism Cretinism Mental/cognitive delay & disability, Mild forms of iodine deficiency in pregnancy 5. Excessive Intake B. Iron (Fe) 1. Types Heme iron o Hemoglobin o Myoglobin Non-heme iron 2. Functions Most abundant trace mineral Component of many enzymes Important in reproduction, growth, healing 3. Recommendations RDA for men >19 years of age = 8 mg RDA for women 19 - 50 yrs of age = 18 mg Assumes 75% heme iron RDA for vegetarians doubled (non-heme iron) Athletes have a 30% higher requirement 4. Sources Meats = Consider bioavailability of
Image of page 8
Image of page 9
  • Fall '19
  • Dietary mineral,  MyPlate

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern

Ask Expert Tutors You can ask 0 bonus questions You can ask 0 questions (0 expire soon) You can ask 0 questions (will expire )
Answers in as fast as 15 minutes