Along with its needing effects, a dietary supplement may cause some unwanted effects. Although copper supplements have not been reported to cause any side effects, check with your health care professional immediately if any of the following side effects occur as a result of an overdose:
Symptoms of overdose
Black or bloody vomit; blood in urine; coma; diarrhea; dizziness or fainting; headache - severe or continuing; heartburn; loss of appetite; lower back pain; metallic taste; nausea - severe or continuing; pain or burning while urinating; vomiting; yellow eyes or skin
More common side effects not listed above may also occur in some individuals. If you notice any other problems, check with your health care professional.