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Copper is a heavy metal that is toxic in its unbound form. Almost all of the copper in the body is bound to proteins, thereby reducing the concentration of unbound copper ions to almost zero. Most diets contain enough copper (2-5mg daily) to prevent a deficiency and not enough to cause toxicity. The World Health Organization (WHO) suggests that 10-12mg per day may be the upper safe limit for consumption.
Causes & Development
Copper toxicity is usually due to:- excessive supplementation
- the increasingly common problem of low levels of zinc in the diet
- contaminated food and drinking water due to contact with metallic copper
- external exposures such as a copper IUD or accidental agricultural overspray
- elevated levels of estrogens.
Since copper and zinc compete with each other for absorption in the gut, copper toxicity has been the subject of greater concern in recent years. This is primarily due to reduced zinc in the diet and the switch from galvanized to copper water pipes. Acidic water such as rain water, left standing in copper plumbing pipes, can be a source of toxicity when consumed. In prolonged contact with copper cooking utensils, an acidic food or beverage can dissolve milligram quantities of copper, sufficient to cause acute toxicity symptoms such as self-limited nausea, vomiting and diarrhea. High copper levels, especially when associated with low zinc levels, have been linked to a variety of symptoms and conditions.
Diagnosis & Tests
The best means of testing for copper toxicity are 24-hour urine copper or serum ceruloplasmin level tests. Red blood cell copper levels may be a good test to measure increased copper levels as well. Hair levels of copper are not very helpful in detecting increased body copper because of external contamination. If contamination is ruled out, hair copper is suggestive of body state.
Complications
If as little as 2gm of a copper salt are ingested, usually with suicidal intent, the resulting copper-induced hemolytic anemia and kidney damage are generally fatal.
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Signs, symptoms & indicators of Copper Toxicity:
Conditions that suggest Copper Toxicity:
Risk factors for Copper Toxicity:
Copper Toxicity suggests the following may be present: | | | | | Nutrients |  Molybdenum Need | The exact mechanism by which molybdenum prevents copper toxicity is poorly understood. However, it is known that an insoluble complex of copper and molybdenum can be formed in the gastrointestinal tract thus reducing copper absorption. This theory is substantiated by the fact that increasing dietary copper is an effective treatment of molybdenum toxicity. |
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Copper Toxicity can lead to:
Recommendations and treatments for Copper Toxicity:
KEY | | Weak or unproven link |  | | Strong or generally accepted link | | | Proven definite or direct link |  | | May do some good |  | | Likely to help |  | | Highly recommended |  | | Avoid absolutely |
GLOSSARY
Acute
An illness or symptom of sudden onset, which generally has a short duration.
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.
Diarrhea
Excessive discharge of contents of bowel.
EDTA
Ethylene Diamine Tetraacetic Acid. An organic molecule used in chelation therapy.
Estrogen (Oestrogen)
One of the female sex hormones produced by the ovaries.
Gastrointestinal (GI, GI Tract)
Pertaining to the stomach, small and large intestines, colon, rectum, liver, pancreas, and gallbladder.
Gram (gm, gms, Gramme, Grammes, Grams)
A metric unit of weight, there being approximately 28 grams in one ounce.
Kidneys (Kidney, Renal)
Bean-shaped organs, each about the size of a fist. They are located near the middle of the back, just below the rib cage. The kidneys are sophisticated reprocessing machines, each day handling about 50 gallons of blood to sift out about half a gallon of waste products and extra water. The waste and extra water become urine, which flows to the bladder through tubes called ureters. The actual filtering occurs in tiny units inside the kidneys called nephrons. Every kidney has about a million nephrons. In a nephron, a glomerulus -- which is a tiny blood vessel, or capillary -- intertwines with a tiny urine-collecting tube called a tubule. A complicated chemical exchange takes place, as waste materials and water leave your blood and enter your urinary system. The kidneys recycle chemicals such as sodium, phosphorus, and potassium and thus regulate their levels. Renal: Pertaining to the kidneys.
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.
Methionine
Essential amino acid. Dietary source of sulfur and methyl groups. Important for proper growth in infants, nitrogen balance in adults, healthy nails and skin and the synthesis of taurine, cysteine, phosphatidylcholine (lecithin), bile, carnitine and endorphins. It is an antioxidant nutrient and lipotropic agent which promotes the physiological utilization of fat.
Milligram (mg, Milligrams)
0.001 or a thousandth of a gram.
Molybdenum
An essential trace element. It helps regulate iron stores in the body and is a key component of at least three enzymes: xanthine oxidase, aldehyde oxidase and sulfite oxidase. These enzymes are involved with carbohydrate metabolism, fat oxidation and urine metabolism. The average adult has about 9mg of molybdenum concentrated mostly in the liver, kidney, adrenal glands, bones and skin. Molybdenum deficiencies are associated with esophageal cancer, sexual impotency and tooth decay.
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.
Ulcerative Colitis (Colitis Ulcerosa)
Ulceration of the colon and rectum, usually long-term and characterized by rectal bleeding or blood in the stool, frequent urgent diarrhea/bowel movements each day, abdominal pain.
Uric Acid (Hyperuricemia)
The final end product of certain native or dietary proteins, especially the nucleoproteins found in the nucleus of cells. Unlike the much smaller nitrogenous waste product urea, which is mostly recycled to form many amino acids, uric acid is an unrecycleable metabolite that must be excreted: nucleoprotein to purine to uric acid to the outside in the urine or the sweat. Hyperuricemia: Having elevated blood uric acid, either from a rapid rate of cell breakdown and synthesis (such as might occur from fasting, heavy training, trauma or any number of major diseases), a high consumption of organ meats, glandular supplements or spirulina, or the inability (usually hereditary) to excrete uric acid in the urine as fast as it is produced, even though production itself is not elevated.
Vitamin C (Ascorbic Acid)
A water-soluble antioxidant vitamin essential to the body's health. When bound to other nutrients, for example calcium, it would be referred to as "calcium ascorbate". As an antioxidant, it inhibits the formation of nitrosamines (a suspected carcinogen). Vitamin C is important for maintenance of bones, teeth, collagen and blood vessels (capillaries), enhances iron absorption and red blood cell formation, helps in the utilization of carbohydrates and synthesis of fats and proteins, aids in fighting bacterial infections, and interacts with other nutrients. It is present in citrus fruits, tomatoes, berries, potatoes and fresh, green leafy vegetables.
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: Mar 16, 2010
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