Copper excess can cause liver damage and GI distress. Learn the safe upper limits, why zinc supplementation can affect copper levels, and who is at risk.
Copper excess can cause liver and GI effects; rare with supplements unless very high doses.
| Standard | RDA | Upper Limit (UL) |
|---|---|---|
| US (FDA) | 900 mcg | 10000 mcg |
| EU (EFSA) | 900 mcg | 10000 mcg |
| AU (TGA) | 900 mcg | 10000 mcg |
| CN (CNS) | 800 mcg | 8000 mcg |
| JP (MHLW) | 900 mcg | 10000 mcg |
RDA = Recommended Dietary Allowance. UL = Tolerable Upper Intake Level. Exceeding the UL long-term may cause the toxicity symptoms described above.
Yes. Copper toxicity is rare from diet alone but can occur from excessive supplementation. Symptoms include nausea, vomiting, diarrhea, and in severe cases, liver and kidney damage. The UL is 10 mg/day. High-dose zinc supplementation without copper can also cause problems by depleting copper.
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Not medical advice. Always consult a qualified healthcare professional for personal medical decisions.