The normal range for total copper in the blood is 62 to 140 micrograms per deciliter (mcg/dL). A low amount of copper could mean that you have: Kidney disease. A nutritional deficiency.
Per the above link:
Total Copper (Blood)
Does this test have other names?
Total copper serum test
What is this test?
This test measures the total amount of copper in your blood. Normally most of the copper in your blood is carried by a protein called ceruloplasmin.
Adults have 50 to 120 milligrams (mg) of copper in their body, mostly in muscle and the liver. Copper helps make melanin, bone, and connective tissue. It also helps with many other processes in your body. You normally get copper through your diet, in foods, such as liver and other organ meats, seafood, beans, and whole grains. You get rid of copper in your bowel movements and urine.
Many health problems can disrupt normal copper levels. This can cause you to have too little copper (copper deficiency) or too much copper (copper toxicity).
Too much copper can be toxic. You can get too much copper from dietary supplements or from drinking contaminated water. You can also get too much copper from being around fungicides that have copper sulfate. You can also have too much copper if you have a condition that stops the body from getting rid of copper. For example, Wilson disease keeps the liver from storing copper safely and from sending copper out of the body in your stool. Extra copper in the liver overflows and builds up in the kidneys, brain, and eyes. This extra copper can kill liver cells and cause nerve damage. Wilson disease is fatal if untreated. Extra copper can also interfere with how your body absorbs zinc and iron.
Why do I need this test?
You may need this test if you have symptoms of either copper deficiency or copper toxicity.
Symptoms of copper deficiency can include:
Anemia
A low level of a type of white blood cells called neutrophils (neutropenia)
Osteoporosis
Paleness
Hair with less pigment than normal
Children with copper deficiency through malnutrition or another condition may have aneurysms in the blood vessels, central nervous system problems, stunted growth, poor muscle tone and muscle weakness, and hypothermia.
Symptoms of copper toxicity include:
Belly pain
Diarrhea
Vomiting
In more severe forms, copper toxicity can lead to:
Heart and kidney failure
Liver damage
Brain disease or disorder
Death
Symptoms of Wilson disease include:
Anemia
Low white blood cell count
Belly (abdominal) pain, dark urine, light-colored stools, poor appetite, yellowing of eyes or skin (jaundice) when the liver is affected
Kayser-Fleischer rings. These are brown rings around the cornea that are visible to a healthcare provider during an eye exam.
Mental illness