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Argyria is the graying of the skin. Colloidal silver can be produced either chemically or electrically. Argyria is a result of ingesting high doses of chemically produced colloidal silver. There has never been a case of Argyria caused by electrically produced colloidal silver.
Please be clear about this, electrically produced silver colloid does not cause Argyria. Hundreds of thousands of people worldwide have been taking electrically produced colloidal silver for decades. The concern is with silver salts, not colloidal silver.

Chemically produced colloidal silver causes Argyria. Colloidal silver was widely used in the early 1900s. Scientists then discovered that if they chemically combined the silver colloid with a protein, it would not only be better digested, but they could produce it in greater concentration.
That led to silver nitrate and silver salts. Before the early 1900s, there had never been any adverse side effects with ingesting silver, so testing the toxicity was not a big concern. But before the toxicity was tested, doctors had already begun to use it on their patients.
As we know now, silver nitrate and other silver salts were toxic in high doses. It caused Argyria, cosmetic bluing, or skin graying produced by a tissue build-up of un-dissolved silver particles.
EPA and CDC Conclusion
The Environmental Protection Agency’s (EPA) Poison Control Center reports no toxicity listing for Colloidal Silver; it is therefore considered harmless. Dr. Samuel Etris, a senior consultant at the Silver Institute, stated that there have never been any allergenic, toxic, or carcinogenic reactions to colloidal silver. The U.S. Government’s Center for Disease Control (CDC) confirmed that in 1995.
However, all silver salts are identified as toxic, although the only adverse effect noted is Argyria. Therefore, the concern is with silver salts, not colloidal silver.
In the case of an improperly prepared silver colloid, even though produced by electrolysis, compounds such as silver oxide, silver chloride, silver nitrate, etc., may be made, which have been recorded as having side effects detrimental to health.
Clear ionic silver has no side effects, and true colloidal silver does not harm the essential bacteria in our intestinal tract.
Colloidal silver should not be used with intravenous EDTA chelation, as silver is a metal, and EDTA works by absorbing and removing metals from the blood. For this reason, the two work in opposition to each other.
Colloidal silver is non-toxic, non-addictive, and has no side effects. The body develops no tolerance to colloidal silver, and one cannot overdose.
Colloidal silver cannot cause harm to the liver, kidneys, or any other organ in the body.
If you are allergic to silver, do not use Colloidal Silver. If your skin reacts to silver when you wear silver jewelry, such as breaking out in a rash, you are most likely allergic to silver.
Colloidal silver is odorless, harmless to the eyes, contains no free radicals, is harmless to human enzymes, and has no reaction with other medications. It improves digestion, aids in regenerating damaged cells and tissues, strengthens the immune system, and helps prevent colds, flu, and all other diseases caused by bacteria, viruses, fungi, or parasites. Colloidal silver is the strongest, safest broad-spectrum antibiotic known today.