Actually aluminum is just the tip of the ice berg when it comes to dangerous chemicals in personal care products. There are over 800 toxic chemicals that are grandfathered in care products that the govt does not regulate. The chemicals are used because they are cheap. Most shampoos are so cheaply made that the bottle cap costs more than the product inside the bottle. Sodium Laurel Sulfate is actually a degreaser used is most shampoos.
Another chemical widely used is propolyne glycol. It is the chemical used in antifreeze. Many European countries will also not allow floride to be in the drinking water as it also is very toxic. Go look at your toothpaste. The back of the package says if children swallow more than a pea size amount you are to call the Poison Control Center. So much is dicussed here about survival, this is just another aspect people need to educate themselves in.

Huck