Consider getting no more than 100% of the US RDA of copper, reducing sugars and carbs, and possibly making sure you get enough zinc, which can mitigate some copper excess (the paper did not talk to zinc). That copper to zinc ratio, as I understand it, should be at 1 mg copper : 7.5 mg zinc.
Do note water supplies can give you plenty of copper. My local water utility shows their samples give 0.5 mg per liter of fresh water. Running your water for at least 15-30 seconds after non-use over night can reduce copper leached into what you drink.
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Previous studies of copper–zinc workers have primarily observed significant increases in lung and other respiratory cancers. This study concurrently examined cancer incidence and cause-specific mortality for a cohort of workers at a copper–zinc producer in Ontario, Canada, from 1964 to 2005. Significant elevations in lung cancer incidence were observed
for males in the overall cohort (standardized incidence ratio [SIR] = 124, 95% confidence interval [CI] = 102-150) and
for surface mine (SIR = 272, 95% CI = 124-517), concentrator (SIR = 191, 95% CI = 102-327), and central maintenance
(SIR = 214, 95% CI = 125-343) employees. Significant elevations of non-Hodgkin’s lymphoma incidence were observed
for male underground mine employees (SIR = 232, 95% CI = 111-426). Occupational etiology cannot be ascertained with
the current exploratory study design. Future studies could (1) incorporate exposure assessment for subgroups within the
existing cohort and (2) determine the efficacy of wellness programs in partnership with the local health unit.
https://journals.sagepub.com/doi/pdf/10.1177/216507991206000506
https://journals.sagepub.com/doi/10.1177/216507991206000506
first sentence “clear “ adj., not v.
EPA Registers Copper Surfaces for Residual Use Against Coronavirus
https://www.epa.gov/newsreleases/epa-registers-copper-surfaces-residual-use-against-coronavirus
“Experts hypothesize the copper accumulation can result from environmental exposures such as tobacco smoking, e-cigarette use or exposure to wildfire smoke. Veterans are known to be at a higher risk for kidney cancer, and exposure to copper in ammunition or at shooting ranges may also be a contributing factor.”