 |  |  | | Picture 2. Although, you could fit the monthly dietary allowance of copper onto a pin head, it is essential to a healthy life. | |  |  | | Recommended Dietary Allowance | |  | | | | According to the World Health Organisation, 13 milligrams per day of copper are required to prevent any symptoms of deficit. In the U.S., there is now an official Recommended Dietary Allowance (RDA) for copper, which highlights its importance as part of a balanced diet. |  | | | |