"Colloidal copper is a popular health supplement. It’s similar to colloidal silver, which is also widely used for wellness and medical purposes.
To make colloidal copper supplements, microscopic molecules of copper are suspended in purified water"
https://www.healthline.com/health/colloidal-copper
"deliver copper to disease-causing bacteria like Streptococcus pneumoniae and MRSA. The copper kills them. Building on the new COVID-19 findings, Johnson is now studying whether or not these same compounds could block SARS-CoV-2 from even entering human cells or hinder their ability to replicate once they do.
“There is precedence for this to work, but I think we can add a novel twist,” explained Johnson.
The compounds, he thinks, could work like this: SARS-CoV-2, like all coronaviruses, is studded with spike proteins—necessary for entry into a host cell—resembling the spikes on a crown. These proteins require metals like zinc to function, and they steal these metals from our own cells. If instead of stealing useful metals like zinc, Johnson could deliver toxic copper to the virus’s spike proteins, it could be rendered inoperable"
https://research.arizona.edu/stories/could-copper-disable-virus-behind-covid-19
"Heavy metals including gold and silver are antibacterial, but copper’s specific atomic makeup gives it extra killing power, Keevil says. Copper has a free electron in its outer orbital shell of electrons that easily takes part in oxidation-reduction reactions (which also makes the metal a good conductor). As a result, Schmidt says, it becomes a “molecular oxygen grenade.” Silver and gold don’t have the free electron, so they are less reactive.
Copper kills in other ways as well, according to Keevil, who has published papers on the effect. When a microbe lands on copper, ions blast the pathogen like an onslaught of missiles, preventing cell respiration and punching holes in the cell membrane or viral coating and creating free radicals that accelerate the kill, especially on dry surfaces. Most importantly, the ions seek and destroy the DNA and RNA inside a bacteria or virus, preventing the mutations that create drug-resistant superbugs. “The properties never wear off, even if it tarnishes,” Schmidt says."
https://www.smithsonianmag.com/science-nature/copper-virus-kill-180974655/
"Cu can kill several infectious viruses such as bronchitis virus, poliovirus, human immunodeficiency virus type 1(HIV-1), other enveloped or nonenveloped, single- or double-stranded DNA and RNA viruses. Moreover, Cu has the potent capacity of contact killing of several viruses, including SARS‐CoV‐2."
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7199671/
"Copper destroys the replication and propagation abilities of viruses, such as SARS-CoV-2, influenza, and other respiratory viruses. Further, copper can eradicate pathogenic organisms such as coronavirus, influenza, human immunodeficiency virus (HIV), and fungi after a short period of exposure."
https://www.news-medical.net/news/20210105/Copper-surfaces-can-inactivate-SARS-CoV-2-in-as-little-as-one-minute-study-finds.aspx