daily dose of copper
Copper is potentially unsafe when used orally in higher doses than the RDA. Copper is present in breast milk. The daily U.S. Recommended Daily Allowance (RDA) is 900 micrograms for adults; 1,000 micrograms for pregnant women; 1,300 micrograms for nursing women; and 890 micrograms for adolescents 14-18 years old.