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Speaker 1: Welcome to brain Stuff from How Stuff Works hy brain Stuff.

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Speaker 1: Lauren voc Obam Here, I've got a classic brain Stuff

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Speaker 1: episode for you today, How do anti purse Prince Work?

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Speaker 1: I wrote this one in the way back and it

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Speaker 1: was performed by our previous host, Christian Saker. Here we go, everyone,

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Speaker 1: I'm Christian and you you stink? I mean, don't take

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Speaker 1: it personally. Pretty much everyone stinks, and pretty much everybody

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Speaker 1: sweats too. There's nothing inherently wrong with these natural body processes,

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Speaker 1: but in modern society we don't want to be at

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Speaker 1: the whim of evolution. Who wants to spend all summer

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Speaker 1: covered in sweat stains or show up at a job

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Speaker 1: interview looking like you ran two miles to get there.

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Speaker 1: Sweat can affect the way other people view you. A

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Speaker 1: study conducted by the International hyper Hydrosis Society explored the

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Speaker 1: social stigma of sweat, with sixty six percent of respondents

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Speaker 1: claiming that visible sweat made them think a person was nervous,

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Speaker 1: while believed those showing excessive sweat to be overweight. If

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Speaker 1: you want to avoid excessive sweating, or if you're a

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Speaker 1: naturally heavy sweater, then you probably need an antiperspirant it's

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Speaker 1: pretty amazing stuff. You just take a quick roll and boom,

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Speaker 1: your sweat problem is salved. But what is this stuff

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Speaker 1: and how does it actually work well? First, we have

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Speaker 1: to make a distinction between deodorant and antiperspirant. Deodorant targets

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Speaker 1: bacteria under your armpits, making the skin. They're too salty

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Speaker 1: or acidic to support bacteria responsible for your body odor.

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Speaker 1: Antiperspirants can cut down on body odor two, but they're

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Speaker 1: primarily made to keep you from sweating. You have two

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Speaker 1: types of sweat glands all over your skin, and they're

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Speaker 1: most concentrated in your under arms. The ekrene glands are

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Speaker 1: the most numerous. They kick in to cool you off

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Speaker 1: when you're hot. So when you're exposed to heat, physical exertion, stress,

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Speaker 1: or nervousness, these sweat glands are stimulated. The cells secrete

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Speaker 1: a fluid that travels from the coiled portion of the

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Speaker 1: gland up through the straight duct and out onto the

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Speaker 1: surface of our skin. These ecrine glands excrete, water, and salt,

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Speaker 1: and for the record, have nothing to do with your

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Speaker 1: body odor. The apocrine glands, on the other hand, those

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Speaker 1: carry secretions of fats and proteins along with your sweat.

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Speaker 1: Once this hits the exterior surface of your skin, those

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Speaker 1: fats and proteins react with bacteria to create odors. Antiperspirants

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Speaker 1: have an active ingredient that gives them sweat blocking power.

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Speaker 1: Typically it's an aluminum based compound like aluminium chloride or

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Speaker 1: aluminium chlorohydrate. When this ingredient gets into the duct leading

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Speaker 1: to each sweat gland, the aluminium ions enter the cells

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Speaker 1: lining the ecrine gland ducts. As the ions enter, water

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Speaker 1: passes into the cells with them. As more water enters,

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Speaker 1: the cells around the duct begin to swell. These cells

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Speaker 1: can swell enough to squeeze the ducts closed. At that point,

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Speaker 1: sweat can't get out and you're staying free for a while.

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Speaker 1: Each cell can only draw in a certain amount of water,

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Speaker 1: so eventually the concentrations of water outside and inside the

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Speaker 1: cells reach equilibrium. When this happens, the water inside the

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Speaker 1: cell begins to pass back out of the cell through osmosis,

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Speaker 1: and the cells swelling goes down. This is why people

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Speaker 1: have to reapply antiperspirant. An average over the counter antiperspirant

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Speaker 1: might have an active ingredient concentration of fifteen. If you've

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Speaker 1: got a real sweating problem. Doctors can prescribe much stronger

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Speaker 1: products for you, but will you want to take them?

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Speaker 1: You see, antiperspirants aren't perfect. Some studies have claimed a

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Speaker 1: link between breast cancer and antipersper rents, although for now

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Speaker 1: that link remains inconclusive. There's another concern to people without

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Speaker 1: fully functioning kidneys should be wary of using antiperspirant. In

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Speaker 1: the US, the Food and Drug Administration requires a warning

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Speaker 1: label on all antiperspirants, stating that people with kidney disease

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Speaker 1: should consult a doctor before using them. If you're not

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Speaker 1: comfortable using antiperspirant, then hey, no worries, just go for

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Speaker 1: an aluminum free deodorant. It won't stop the sweat, but

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Speaker 1: it will knock out that odor. Today's episode was produced

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Speaker 1: by Tyler Clang. If you miss Christian and want to

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Speaker 1: hear more from him and check out his new podcast,

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Speaker 1: super Context, available wherever you get your podcasts, and of

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Speaker 1: course from lots of boy topics that are so fresh

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Speaker 1: and so clean clean, visit our home planet, how Stuff

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Speaker 1: Works dot com.