Can bentonite clay pass into blood, leaky brain?

Hi. I've just started Dr Schulzes intestinal #2 formula, but started thinking earlier today about Bentonite clay, charcoal and the brain. Does these substances ever leave the colon, and pass in through the blood? I believe I have leaky gut, and have understood that leaky brain very often results from this. I got worried that the clay would get stuck in my brain while trying to attract mercury, and that I would wonder around with clay in my brain.

Anyone who knows anything about this, and maybe can explain a bit about it to me?

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