From "The real facts on colloidal silver" by Marshall Dudley with special thanks to Mike Devour, Brooks Bradley, Frank Key, Ode Coyote, Trem, Richard Harris, Rowena Evans [others to be added]
What happens when you take silver compounds.
A silver compound will typically become silver chloride as soon as it hits the stomach. The silver chloride is sparingly soluble, about .8 ppm. The dissolved silver chloride will move into the blood stream and once there will be exposed to chemicals that will induce the silver to plate out on any other silver particles present. However when silver compounds, such as silver chloride or silver nitrate are taken initially there will be no other silver particles present, so the silver chloride circulates in the blood until exposed to light in the skin, where they are photo reduced to silver atoms. This is the photographic process that occurs when you take a picture (with a film camera). Once the silver atoms are produced in the skin, then the rest of the silver chloride will begin reducing onto those particles making them grow very fast, and resulting in many of them getting stuck in the skin. Since the particles are so small, they will appear as black or blue, giving the skin a bluish cast. This is called argyria, and can result from taking silver compounds without any colloidal component. Applying silver compounds directly to the skin can increase the effect tremendously.
What happens to EIS when taken internally?
Since there are two components to EIS, then two different things happen.
The colloidal portion diffuses through the stomach wall rather quickly and enters the blood stream as long as the particles are small enough.
The ionic portion is a combination of silver hydroxide and silver oxide. While in solution they continually convert from one to the other and back again. Each has a solubility of about 13 ppm, so any EIS which is less than about 26 ppm and a pH of 7 will be totally dissolved. Upon contact with the HCl (hydrochloric acid) of the stomach both of these compounds will immediately form silver chloride. The silver chloride has a solubility of .8 ppm, so most of the silver chloride will precipitate out, but the remaining part will quickly move into the blood stream. As it does, that which precipitated will redissolve and move into the blood stream as well. The end result is that most of the silver chloride will move into the blood stream over time, but at a lower rate than the colloidal portion.
Once it is in the blood stream it is exposed to the same effects we discussed for silver compounds above. Basically it will try to plate out on any silver particles it finds. Since there will be colloidal silver which already passed into the blood, there will be lots of particles for it to plate out on. So in short order the silver in the silver chloride plates out onto the colloidal particles already there, and they grow by a small amount. Typically for an EIS of 10% particulate content, the particles should grow to about double in size. This is insufficient to cause them to get caught up into tissues, and they eventually get removed by the kidneys.
So, as it turns out. colloidal silver is actually a prophylactic against argyria, instead of a cause as some would have you believe.
How does H2O2 affect EIS
When H2O2 is added to EIS (one or two drops per glass of EIS), it will be noted that there is an immediate clearing effect. The Tyndall (what you see if you shine a laser pointer though the liquid) will become very faint as well. If the ppm of the EIS is sufficiently high (25 to 30 ppm) a white cloudy precipitate may form as well.
There are a number of reactions that occur. H2O2 is normally thought of as an oxidizer, but it can act as a reducer as well. Also silver is considered a catalyst for H2O2, but in actuality gets directly involved in the reactions.
The H2O2 reacts with the silver particles, producing ionic silver, a combination of silver hydroxide and silver oxide. This makes the large particles disappear, reducing the tyndall. However H2O2 also reacts with the silver oxide and silver hydroxide producing a 2 atom colloid of silver plus oxygen (and water in the case of silver hydroxide). Over time this 2 atom colloidal particle can end up being converted back to silver oxide and silver hydroxide, and so forth. The final result is a mixture of ionic silver (hydroxide and oxide) and very small colloidal particles. Thus if you add H2O2 to freshly made EIS, you can sometimes see the oxygen bubble off, and the tyndall may change significantly. But more importantly, the particulate portion of the EIS will go from being medium or large particles to many more very small particles, and the particle content will increase from a typical 5-15% to around 30-50%. If you have a strong tyndall from large particles, it will decrease, and if you have a weak or no tyndall it will increase with the formation of the 2 atom particles. This enhances absorption, as well as effectiveness. Note that it is recommended to let the EIS sit for 5 or more minutes after adding the H2O2 to let it stabilize. Also some experts recommend letting EIS age for 2 or more days before adding the H2O2, and experiments by me indicate a more consistant effect if this is done. For some images of the effect H2O2 has on silver particles see Hydrogen Peroxide and Colloidal Silver Micrographs.