RE your question about 'plateout'. You'll need to provide a bit more information to get more responses I think.
1. Volume you're producing?
2. Battery unit or current controlled?
3. Electrode configuration, ie loops or straight rods?
4. Stirring or non stirring?
Put up a few more details of your equipment and practices.
"Makes me wonder if this type of things isn't happening in the stomach as well."
The short answer to this question would be - What if it did? Who's gunna notice? But to put your mind at rest, I seriously doubt there is any information available in the public domain regarding this question. My answer would be absolutely and categorically NO. When EIS/CS comes in contact with stomach acids, salts, ammonias, peroxides and whatever else is floating around in the human body, I doubt anything remotely like that would be occurring. But as I said, even if it did, who cares anyway? It's not like anyone is gunna slice you open to have a look. Don't concern yourself about internal cosmetics cos in all likelihood it doesn't exist.