Hello everybody:
I am not using any deodorants or antiperspirants, that is why I did not "see" this post for so long. But with so many "hits" I could not resist, and so are my 2c.
I heard of one person (don't remember woman or man) who had developed serious kidney problems after using antiperspirant for a period of time.
Kidneys are the kind of organs, which do not give much feedback, as they are dying of abuse and neglect. Only when about 10% of functional capacity is left, then you begin to feel it, and even then, mostly as systemic effects.

Once I was talking to a guy in his room in U residence, his roommate came in, he took off his shirt, applied something to his armpits, then cologne to a few spots of his body and hair, put on another shirt and went out.
I was shocked! There is no other word to describe my feelings! It just did not look reasonable! If I have to change shirts, then this is an opportunity to wash up a little. How long does it take to run a face cloth over the armpits a few times?
Obviously, it is much easier for guys, but if you see at least one person with critically iinadequate kidney function, as I have during my stint through a nursing school, you would reevaluate many things.

Regarding aluminum absorption, I talked once to a guy who used to work for one major US aircraft manufacturer in Canada (I do not want to name it, they all use the same technology). They were machining plenty of aluminum alloys. He said EVERYBODY has got Alzheimers by their late 40s-early 50s. I can only guess how he found out about it, I would imagine he kept in touch with some folks.
He was very glad he had left after a relatively short period of time there. I would imagine that most of the aluminum absorption comes from inhaling dust, since every machine shop does plenty of grinding and polishing, which produce very fine dust. So in this case it is not even absorption of MOLECULES, but of specks of dust!
I would imagine alveolar mucosa absorbs differently, as compared to skin, but this is still smth to think about.
However, we also cannot exclude that some aluminum got absorbed through skin, since aluminum particles would inevitably end up in a coolant and a machine operator handles wet parts all day long.
A yet another possibility is that some aluminum was inhaled through coolant aerosol. LOts of it are formed in any machine shop, since parts are continuously blown with compressed air to remove coolant droplets.

Continuing with the argument of aluminum absorption, if you read medical sources, it is clearly stated that Hep C can only be transmitted through blood contact. But if you talk to people from South Asia, where there is lots of Hep C, they would tell you they've got it through contaminated water.

The official story about AIDS transmission is the same, and yet I heard that a study about transmission via mosquitoes was terminated abruptly, as soon as it appeared that the findings would contradict the official lie.

That is why I believe we would be much better off if we develop a natural distrust of sweet-talking PR and marketing folks.
(just look at the propaganda about fluoridation, vaccines, GM foods etc!)
Oleg