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Zinc Toxicity
  Zinc, Toxicity
 Signs, symptoms, indicators
 Conditions that suggest it
 Contributing risk factors
 Treatment recommendations
 


Excess zinc is toxic. Too much zinc will interfere with the metabolism of other minerals in the body, particularly iron and copper. Zinc toxicity, along with an induced copper deficiency, is becoming more of a problem as the routine and chronic use of large doses of zinc becomes more common. Those on long-term supplementation should be monitored for zinc and copper status.

Causes & Development


Symptoms of zinc toxicity occur after ingestion of 2gm of zinc or more.





Signs, symptoms & indicators of Zinc Toxicity:
Symptoms - Gas-Int - General  (Regular/frequent) unexplained nausea
 Symptoms of zinc toxicity include nausea, vomiting and fever.

  (Regular/frequent) unexplained vomiting

Symptoms - Metabolic

  Occasional/frequent unexplained fevers

Conditions that suggest Zinc Toxicity:
Autoimmune  Autoimmune Tendency
 Prolonged large doses of zinc may, by lowering manganese levels, increase susceptibility to autoimmune reactions.

Nutrients

  Manganese Requirement
 An insidious effect of excess zinc over a period of years is the reduction of serum manganese, 90% of which is contained in the erythrocytes.

Risk factors for Zinc Toxicity:
Supplements and Medications  Much zinc supplementation
 Long term administration of high doses of zinc require monitoring zinc status and should be consumed with small doses (2mg) of copper.

  History/absence of copper supplementation

Counter-indicators:
  Copper supplementation

Recommendations and treatments for Zinc Toxicity:
Lab Tests/Rule-Outs  Test Copper Levels
  Test Zinc Levels
  Test for Manganese Levels
 Zinc causes a decrease in serum manganese levels.

Mineral

  Copper
 Low doses of copper will help restore the imbalance between zinc and copper caused by long term excessive zinc intake.


Not recommended:
  Zinc


KEY
Weak or unproven link
Strong or generally accepted link
Proven definite or direct link
Strongly counter-indicative
Highly recommended
Reasonably likely to cause problems


GLOSSARY

Autoimmune Disease (Autoimmune, Autoimmunity)
One of a large group of diseases in which the immune system turns against the body's own cells, tissues and organs, leading to chronic and often deadly conditions. Examples include multiple sclerosis, rheumatoid arthritis, systemic lupus, Bright's disease and diabetes.

Chronic (Chronicity)
Usually referring to chronic illness: Illness extending over a long period of time.

Copper
An essential mineral that is a component of several important enzymes in the body and is essential to good health. Copper is found in all body tissues. Copper deficiency leads to a variety of abnormalities, including anemia, skeletal defects, degeneration of the nervous system, reproductive failure, pronounced cardiovascular lesions, elevated blood cholesterol, impaired immunity and defects in the pigmentation and structure of hair. Copper is involved in iron incorporation into hemoglobin. It is also involved with vitamin C in the formation of collagen and the proper functioning in central nervous system. More than a dozen enzymes have been found to contain copper. The best studied are superoxide dismutase (SOD), cytochrome C oxidase, catalase, dopamine hydroxylase, uricase, tryptophan dioxygenase, lecithinase and other monoamine and diamine oxidases.

Gram (gm, gms, Gramme, Grammes, Grams)
A metric unit of weight, there being approximately 28 grams in one ounce.

Insidious
A symptom or condition of gradual onset or development.

Iron
An essential mineral. Prevents anemia: as a constituent of hemoglobin, transports oxygen throughout the body. Virtually all of the oxygen used by cells in the life process are brought to the cells by the hemoglobin of red blood cells. Iron is a small but most vital, component of the hemoglobin in 20,000 billion red blood cells, of which 115 million are formed every minute. Heme iron (from meat) is absorbed 10 times more readily than the ferrous or ferric form.

Manganese
An essential mineral found in trace amounts in tissues of the body. Adults normally contain an average of 10 to 20mg of manganese in their bodies, most of which is contained in bone, the liver and the kidneys. Manganese is essential to several critical enzymes necessary for energy production, bone and blood formation, nerve function and protein metabolism. It is involved in the metabolism of fats and glucose, the production of cholesterol and it allows the body to use thiamine and Vitamin E. It is also involved in the building and degrading of proteins and nucleic acid, biogenic amine metabolism, which involves the transmitting of nerve impulses.

Metabolism (Metabolic, Metabolize, Metabolizes, Metabolizing)
The chemical processes of living cells in which energy is produced in order to replace and repair tissues and maintain a healthy body. Responsible for the production of energy, biosynthesis of important substances, and degradation of various compounds. Also defined as the sum total of changes in an organism in order to achieve a balance (homeostasis): Catabolic burns up, anabolic stores and builds up; the sum of their work is metabolism.

Milligram (mg, Milligrams)
0.001 or a thousandth of a gram.

Mineral (Minerals)
Plays a vital role in regulating many body functions. They act as catalysts in nerve response, muscle contraction and the metabolism of nutrients in foods. They regulate electrolyte balance and hormonal production, and they strengthen skeletal structures.

Nausea
Symptoms resulting from an inclination to vomit.

Red Blood Cell (Erythrocyte, Erythrocytes, RBC, Red Blood Cells)
Any of the hemoglobin-containing cells that carry oxygen to the tissues and are responsible for the red color of blood.

Serum
The cell-free fluid of the bloodstream. It appears in a test tube after the blood clots and is often used in expressions relating to the levels of certain compounds in the blood stream.

Zinc
An essential trace mineral. The functions of zinc are enzymatic. There are over 70 metalloenzymes known to require zinc for their functions. The main biochemicals in which zinc has been found to be necessary include: enzymes and enzymatic function, protein synthesis and carbohydrate metabolism. Zinc is a constituent of insulin and male reproductive fluid. Zinc is necessary for the proper metabolism of alcohol, to get rid of the lactic acid that builds up in working muscles and to transfer it to the lungs. Zinc is involved in the health of the immune system, assists vitamin A utilization and is involved in the formation of bone and teeth.




Last updated: Apr 13, 2008


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