How Colloidal Silver Is Absorbed

While there is much more to be learned about silver absorption, there is a plethora of reliable information already available.

Silver can be absorbed orally (via the mouth to the gastrointestinal tract), nasally (via the mucous membranes in the nose), and dermally (via the skin). Humans can absorb silver from food or drink, the air, and via skin creams or sprays. The human body can also absorb inserted silver; for example, a silver-coated medical device inserted in the body can allow the body to absorb a certain amount of silver.

The average person who does not actively use any silver-containing preparations may feel that he or she is not absorbing silver, but this is not necessarily true. In the modern world, there is a wide range of ways in which silver can be absorbed passively.

Some include:

  • dental fillings using silver amalgams
  • drinking water filtered with a silver-containing filter
  • anti-smoking therapies containing silver acetate
  • foods containing silver


The World Health Organization (WHO) has measured silver levels in several common substances. With regard to air, a WHO study found that “ambient air concentrations of silver are in the low nanogram per cubic meter range.”[1] Most water in the U.S. that has not undergone any special treatment has a silver concentration ranging between non-detectable and 5mg/quart. The WHO found that the silver levels of food varies between 10 to 100 mg/2lbs; however, this passive silver absorption does not appear to be a cause for concern. According to the World Health Organization, “Only a small percentage of silver is absorbed. Retention rates in humans and laboratory animals range between 0 and 10 percent.”[2]

On the other hand, the body can absorb much higher rates of orally administered colloidal silver. The WHO reports that this can be as much as 5 percent. People who are exposed to silver on a daily basis can retain as much as 10 percent.

Other known points regarding colloidal silver absorption include:

  • Colloidal silver that enters the bloodstream gets ferried around by globulins, proteins present in the human circulatory system.
  • When colloidal silver enters the tissue, it is usually found as part of cell cytosol, the liquid inside the cell.
  • The body prefers to store silver in the liver and skin, with lower concentrations in various other organs.
  • Silver stored in the liver has a biological half-life of between a few to fifty days. Half-liferefers to the time it takes for a quantity to decay to half its value.


“This statement has not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.”

[1] “Silver.”

[2] Ibid.