Some copper-rich foods, which serve to maintain blood health, include calf or boiled liver, mussels, raw or cooked oysters, whole grains, cashew, peanuts, almonds, walnuts or chocolate, for example.
Copper deficiency in the body is rare because the amount of copper found in food is sufficient to meet the copper needs the body needs. On the other hand, excess copper in the body can cause diarrhea or metallic taste in the mouth, for example.
List of copper-rich foods
| Copper-rich foods | Weight (g) | Copper (mg) |
| Cooked veal liver | 100 | 9.9 |
| Boiled beef liver | 100 | 4.5 |
| Cooked oysters | 100 | 2 |
| cashew | 65 | 1.4 |
| Brazil nuts | 70 | 1.2 |
| Raw oyster | 100 | 1.1 |
| Hazelnut | 68 | 1 |
| Almond | 78 | 1 |
Copper can also be found in tap water when it passes through copper plumbing. In this case the excessive intake of copper can cause metallic taste in the mouth, excessive salivation, nausea, vomiting, burning in the stomach, gastrointestinal bleeding and diarrhea.
The recommended dietary intake (RDA) of copper for the healthy adult is approximately 0.09 mg per day. In children the RDA value varies between 0.034 to 0.07 mg of copper per day.
