What is the #1 food highest in copper?
The short answer
Beef liver and oysters are the richest common dietary sources of copper. Depending on the reference, one or the other tops the list — both provide well above a full day's copper in a single modest serving. Other high-copper foods include other shellfish, organ meats, dark chocolate, nuts, and seeds.
Top dietary sources
- Beef liver — among the most concentrated sources; a small serving far exceeds the 900 mcg RDA.
- Oysters and other shellfish — consistently very high in copper.
- Other organ meats — such as lamb or veal liver.
- Dark chocolate and cocoa — a surprisingly rich plant source.
- Nuts and seeds — cashews, sesame, and sunflower seeds in particular.
- Whole grains and beans — moderate but reliable everyday sources.
Why most people already meet the RDA
Because copper is spread across so many common foods, average U.S. intake (roughly 1,100–1,400 mcg/day) already exceeds the 900 mcg RDA for most adults. Supplementation is most useful when the diet is restrictive, absorption is impaired, or high-dose zinc is depleting copper — see how much copper bisglycinate to take per day.
Sources
- NIH Office of Dietary Supplements — Copper Fact Sheet for Health Professionals — ods.od.nih.gov
- Harvard T.H. Chan School of Public Health — The Nutrition Source: Copper — nutritionsource.hsph.harvard.edu
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