What's so dangerous about making your own colloidal silver?
It's simple chemistry. Sure, when you put two electrodes into a glass of water, make one positive and the other negative, then run an electrical current through them, ions of one electrode will break-off and flow towards the other electrode. If both electrodes are of the same material, these break-away particles will not stick to the other electrode: they'll stay in the water.
That's the concept behind the "make it yourself" kits that run on batteries, or even the more expensive ones that use AC (house current). But here's the problem, and why it's dangerous to make your own colloidal silver.
Obviously, you'd want your colloidal silver creation to be as pure as possible. You'd use ONLY 99.999% silver electrodes and you'd use ONLY distilled water (to keep any other chemical reaction from happening), but the thing that makes it all go wrong is salt.
Salt is what all sellers of those kits tell you to add to the water as a "catalyst" to make the process more effective. Salt is extremely electrically conductive and will increase the electrical/chemical reaction in the water.
The problem is that when you run an electric current into this saline (salt) solution, you create, NOT colloidal silver, but silver chloride, a toxic substance. Basic chemistry would tell you that.
Silver chloride will still act in an antibiotic manner (so will ground-up pure silver, for that matter) but it now has become toxic. Use of silver chloride WILL cause toxic-metal buildup, resulting in a blue/grey color to your skin.
Recently, a "blue man" has been on TV, telling the show hosts how he makes his own colloidal silver (nope - silver chloride) and that's why he's blue.
There are NO KNOWN CASES of Agrayia from Colloidal Silver in the world. Silver oxide, silver chloride and various medical concoctions can, and have, turned people's skin gray to blue, but NEVER has CS been proven to do so.

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