For the past few years I have tried to avoid using conventional deodorants, the ones with aluminum chlorohydrate and other such compounds in them. There are concerns in some quarters about those compounds being absorbed into the skin and not being properly flushed out, with possible links to breast cancer (hey, it makes sense when you consider the proximity of breasts to newly-shaved armpits!) and/or Alzheimers.
I tend to also be very leery of marketing, especially of natural products. (Like the whole "multigrain bread" thing--all they have to do is put a couple of grains of oat flour into their bleached white stuff and suddenly it's multi-grain. Harumph.) So when I can find actual chemistry to support something, it makes me feel a little more confident.
On the other hand, my own knowledge of chemistry pretty much comes from tenth grade and two parents who are chemistry teachers. (My mom sometimes reads this blog...maybe she'll comment?) So if they are blowing chem-talk up my smelly armpits, I won't necessarily know. However, the below does sound fairly sensible:
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