I am not sure about that one, there are differing reports. Hal Huggins believes it should not be used that it methylates mercury, yet other reports say it's fine and biochemist Andy Cutler seems to think it's ok in his book and he's also an expert on mercury ....It does not pull mercury out of fillings, so that part of it is safe.

It depends on the person's reaction to taking it. If they don't like how they feel, then simply stop.