Studies on taking 10 mg copper to 20 mg copper, show zero harm, specifically, no liver damage: Supplementing Copper at the Upper Level of the Adult Dietary Recommended Intake Induces Detectable but Transient Changes in Healthy Adults  (Olivares, 2005) https://jn.nutrition.org/article/S0022-3166(22)10429-3/fulltextNote, they call copper at 10-20 mg “mild copper excess”.“Abstract The health consequences of “mild copper … Continue reading The Copper Revolution: Ch 10: Copper at 10 mg to 20 mg does not harm the liver (Olivares)