Re: Aluminum is a toxic metal.
Aluminium oxide is in a form different from the direct metal form of it. Our own skeleton contains it, soil contains it, as well as many foods we eat (cheese being one). Here is one article talking about it on this link.
http://www.vident.com/general.php?id_pages=205
It is not to say that it is totally non toxic, but we get it in so many things already. The key is not going over the limit in our consumption of it.
Mercury is always going to be more toxic in the presence of other metals, lead, arsenic, copper etc. I can't comment on how it is with aluminium oxide, because it's not in the form of a direct metal. They even make artificial body parts with aluminium oxide, which goes inside someone's body. So, I only know that as aluminium oxide is in quite a few things we consume anyway, it's only a question of being careful not to over consume it.
I know someone who was very mercury toxic and had brain symptoms, the lot. They finally had their mercury replaced with porcelain ceramics (the ones that do not contain metal bases). Porcelain is made up mainly of aluminium oxide. They are healing and getting their life back and doing very well. So it definitely depends on personal sensitivity and consumption of it in daily life, as to whether it will cause a problem. I do not believe it makes mercury 50 times more toxic in oxide form. Maybe the direct metallic form of it if someone is working in a factory and sawing aluminium and breathing in the direct metallic dust from this.
This again is not the same as oxide form that we consume in diet, which I doubt is cause for too much concern, unless once again, there is over consumption or absorption of it.
Definitely, I would not advise taking something directly that contains a lot of it and digesting it, which may go over that limit and cause problems.
This is just my view, I've done some reading, but again I can't be certain and it's obviously a case of keeping the levels within tolerance and i gather it depends on a person's sensitivity to it too.