Canadian Medical Guide > Vitamins & Mineral Food Supplement Guide
Iron
Vitamin / Mineral Supplement Overview:Iron has been used for therapeutic uses for thousands of years. It was used by the Egyptians to cure baldness and by the Greeks it was used in wine to restore male potency. It is the most plentiful element on earth and it is an essential trace mineral for humans. Two-thirds of the iron present in the body - about 3.5 g to
4.5 g - are in the blood and the rest is stored in the liver, spleen, bone marrow and muscles.
Iron is an essential component of hemoglobin, myoglobin and a cofactor of several essential enzymes. Of the total iron in the body, 60 to 70 percent is stored in hemoglobin (the red part of red blood cells; a component of myoglobin, an iron-protein complex in muscles. When the muscles work harder this complex helps in getting them extra energy.
How This Mineral Works in Your Body:
Transports oxygen and contributes to the storage of oxygen in the
cells
Prevents and treats iron-deficiency anemia due to dietary iron deficiency
or other causes
Stimulates bone-marrow production of hemoglobin, the red-blood-cell
pigment that carries oxygen to body cells
Forms part of several enzymes and proteins in the body
Essential for protein metabolism
Assist in the production of thyroid hormones, connective tissue
and several brain neurotransmitters
Maintains a healthy immune system
May help alleviate menstrual pain
May stimulate immunity in iron-deficient people
May promote learning in children with iron deficiency
Many women, of child-bearing age, with heavy menstrual flow and
women with long or short menstrual periods (common in teenage girls)
Anyone with inadequate caloric or dietary intake or increased nutritional
requirements
People over the age of 55
Pregnant or breastfeeding women
Those who abuse alcohol or other drugs
People with a chronic wasting illness
Those under excess stress for long periods
Anyone who has recently undergone surgery
Athletes and workers who participate in vigorous physical activities
Anyone who has lost blood recently such as from heavy menstrual
periods, an accident or long-term, undetected gastrointestinal bleeding
Vegetarians with inadequate dietary intake
Infants from 2 to 24 months
Where Iron Mineral is Found:
Bread, enriched
Mussels
Egg yolk
Oysters
Fish
Red meats
Garbanzo beans (chickpeas)
Seaweed,
Greens
Whole-grain
Lentils
Liver
Molasses, blackstrap
Dried fruits
Poultry
Enriched cereals
Soybean flour
Flour
Note: People with normal iron levels in their body absorb about 10 percent of the food iron consumed from food; however, an iron-deficient person can absorb about 20 to 30 percent.
Using Iron:
A prescription is required for some forms of an iron supplement
Take whole, as a tablet or capsule, with a full glass of liquid.
Do not chew or crush it. Take along with food or immediately after
food consumption to lessen stomach irritation.
When taking orally, dilute in at least ½ glass of water or another
liquid. Take with your meals or 1 to 1-1/2 hours after your meal
unless otherwise advised by your physician.
Chewable tablets should be chewed well before swallowing.
As an enteric-coated tablet, take whole with a full glass of liquid.
Take with your meals or 1 to 1-1/2 hours after your meal unless
otherwise advised by your physician.
Iron is Available as:
Syrups
Chewable tablets
Tablets
Capsules
Injections
Ferritin, an iron protein complex
Obtained both naturally and synthetically
Recommended Daily Iron Intakes:
Suggest Intake: 10-18 mg
Men: 10 mg
Women: 15 mg
Pregnant: 30 mg
Lactating: 15 mg
Children: 10 mg
Medical Precautions:
Do not take if you have:
An allergy to any iron supplement
Acute hepatitis
Hemosiderosis or hemochromatosis (conditions involving excess iron
in body)
Hemolytic anemia
Had repeated blood transfusions
Consult your doctor if you have:
Any plans to become pregnant while on mediation
Had peptic-ulcer disease, enteritis, colitis
Had pancreatitis or hepatitis
A history of alcoholism
Kidney disease
Intestinal disease
Excess vitamin C - problematic in people with iron-storage disorder.
Over 55:
Deficiency is a common occurrence. Frequently check with your physician
for symptoms of anemia or slow blood loss in your stool.
If your family has a history of heart disease, consult your physician
before adding an iron supplement to your diet.
Pregnancy:
Being pregnant increases the need for iron. Consult with your physician.
In the first 3 months of pregnancy, take an iron supplement only
if prescribed by your physician.
Breastfeeding:
You probably do not require a supplement if you are healthy and
eat a well balanced diet, however you should consult with your physician.
Your infant might need supplementation, namely if they are premature.
Consult with your physician.
Iron Vitamin Supplement Storage:
Keep in a cool and dry location and away from direct light, but
do not freeze.
Keep safely away from children, with a childproof cap. Unfortunately,
children have been known to overdose on Iron tablets due to their
likeness to candy.
Do not keep in bathroom medicine cabinet. Heat and dampness may
alter the action of the mineral.
Safe Iron Vitamin / Mineral dosage:
It is advised that you consult with your physician for the proper
dose for your condition
Others:
Iron can build up to harmful levels (hemosiderosis) in patients
with chronic kidney failure, Hodgkins disease or rheumatoid arthritis.
Extended use in high doses can cause hemochromatosis (iron-storage
disease), leading to bronze skin, diabetes, liver damage, impotence
and heart problems.
Symptoms of Iron Deficiency:
Listlessness
Heart palpitations upon exertion
Fatigue
Irritability
Pale appearance to skin, mucous membranes, nails
Decreased mental capacity, learning deficit
Pica
Iron Overdose:
Signs and symptoms: What to do:
Early signs: Diarrhoea with blood, severe nausea, abdominal pain,
vomiting with blood : Discontinue use of mineral and consult with
your physician.
Late signs: Weakness; collapse; pallor; blue lips, hands, fingernails;
shallow breathing; convulsions; coma; weak, rapid heartbeat : Discontinue
use of mineral and consult with your physician.
Too much iron may result in an increased risk of cancer and coronary
disease : Discontinue use of mineral and consult with your physician.
Accidental Overdose:
Dial 911 (emergency), 0 for operator or call your closest Poison
Control Center for immediate attention.
Iron Lab tests for deficiency detection:
Serum ferritin
Serum iron
Total Iron-Binding Capacity (TIBC)
Red-blood-cell count
Microscopic exam of red blood cells
Effect on lab tests:
Iron may cause unusual outcomes in serum bilirubin, serum calcium,
serum iron, special radioactive studies of bones using technetium
(Tc-99m-labeled agents) and stool studies for blood.
Iron Side Effects:
Signs and symptoms: What to do:
Abdominal pain : Discontinue use. Call physician immediately.
Black or gray stools (always) : Nothing.
Blood in stools : Seek emergency treatment
Chest pain : Seek emergency treatment.
Drowsiness : Discontinue use. Call physician when convenient
Stained tooth (with liquid forms) : Mix with water or juice to lessen
effect. Brush teeth with baking soda
or hydrogen peroxide to help remove stain.
Throat pain : Discontinue use. Call physician immediately.
Interactions:
Interacts with: Combined effect:
Allopurinol : May cause excess iron storage in liver.
Antacids : Does not allow sufficient iron absorption.
Calcium : Combination necessary for efficient calcium absorption.
Cholestyramine : Decreases effect of iron.
Copper : Aids in copper absorption.
Iron supplements (other) : May result in excess iron storage in
liver.
Pancreatin : Decreases absorption of iron.
Penicillamine : Decreases penicillamine effect
Sulfasalazine : Decreases effect of iron.
Tetracyclines : Decreases tetracycline effect Take iron 3 hours
before or 2 hours after taking tetracycline.
Alcohol : Increases the utilization of iron and may cause organ
damage
Milk, cheese, yogurt and eggs, tea, coffee, spinach bran, whole-grain
and cereals : Decreases the body's uptake of iron
Vitamin C : Enhances the body's uptake of iron
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