Clay is often used as a laxative, and depending on which kind you're talking about, it can also have other properties. My concern, if you're actually eating the clay, which gfron1 says is not his intention
, is that it can interact with the body and with pharmaceuticals in a number of ways. I've had only a couple of mineralogy courses and am far from an expert, so I'm not about to venture any guesses, etc. I would also think that cooked clay would be a whole 'nother matter from raw clay. If serving it to people to eat, I would research:
1. If I were serving it cooked, and if it were actually edible at that point, whether enough vitrification would have taken place to make it harmful; it's generally not a good idea to eat glass.
2. If it were being consumed in its raw state, whether there would be possible drug interactions, since it has properties of binding with certain types of molecules. For example, it's used in face masques - the kind that come in jars -- because of its ability to bind with dirt, oil, and other substances, and "pull" them out of the skin. I don't know how selective that process is, but if it's consumed within a certain amount of time after someone has taken certain medications, I would be concerned about what the result would be. I would predict (which would have to be researched, also) that people with certain kinds of health issues would not want to consume it, whether it would affect their medications or not.
If the clay isn't being consumed, and if the clay comes in a form that is considered food safe by the purveyor, then I doubt very much that there would be an issue. I'm concerned only about where they clay comes from and whether it's going to be consumed.
Any interest in salt-baking as an accessible, less risky alternative?
I just showed my sculptor gf this thread and she said that potters' clay isn't even safe enough to breathe, never mind eat.
What's the risk? If he uses an edible/foodsafe clay as opposed to the potters or yard clays people keep using as a basis for their concern why would there be a risk involved? I'm going to take one for the team here. I'll obtain some kaolin and bentonite clay powders, bake some things in them, eat, rinse and repeat a few times and report on my health. Rob: if the forum never hears from me again, scrap the idea! Maybe the clay will neutralize the tonka beans and cherry pits I use to flavor things now and then.