How many people have had adverse effects from using Colloidal Silver?

    What follows is an FDA Freedom of Information Act Report on Colloidal Silver, where Brent Finnigan of Tacoma, Washington,  November 3rd 1999 requested information on any adverse effects reported from the use of colloidal silver.

Public Health Service
Center for Drug Evaluation and Research
Office of Training and Communication
Freedom of Information Staff HFD-205
5600 Fishers Lane 12 B 05
Rockville, Maryland 20857


department of health and human services             


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November 3, 1999

In Response Refer to File: F99-22589

Brent Finnigan Takoma (sic), WA 98408

Dear Mr. Finnigan:

This is in response to your request of 10/14/99, in which you requested adverse events associated with the use of Colloidal Silver. Your request was received in the Center for Drug Evaluation and Research on 10/25/99.

We have searched the records from FDA's Adverse Event Reporting System (AERS) and have been unable to locate any cases that would be responsive to your request.

 Charges of $3.50 (Search $3.50, Review $0, Reproduction $0, Computer time $0) will be included in a monthly invoice. DO NOT SEND ANY PAYMENT UNTIL YOU RECEIVE AN INVOICE.

If there are any problems with this response, please notify us in writing of your specific problem(s). Please reference the above file number.


Hal Stepper
Freedom of Information Technician
Office of Training and Communications
Freedom of Information Staff, HFD-205

A few notes of interest...

      Colloidal Silver is rated safe and harmless in any concentration and/or dosage level under any use by FDA and Center for Disease Control and classified as a mineral water. The metallic particles are molecular and therefore not a metal but a mineral. The particle sizes range between .001 and .015 microns in size. 

    Furthermore, it’s the particle size that sets the liquid to it’s gold color. The only two types of quality colloidal silver available in our opinion is the gold and clear types. The clear types are made using High Voltage Electrolysis yielding extremely small ions ( < .0005 microns ) that result in a completely clear solution. When the particles are .001 to .015 microns the solution is a golden almost phosphorescent color. Both are equally effective and show no difference save the color. The one aspect that suggests the gold color is preferred is that you don't need a lab test to validate its potency where you will for the clear type colloidal's.