Quote:
Originally Posted by memyselfni
First anyone who thinks your skin cant absorb something thru it then why does the nicoteen patch work so well for smokers? Why can you put a patch on your hip to prevent pregnancy? How can your rub wild yam estrogen cream on your hands as directed to help with menopause?
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I never said that there was no such thing as trans-dermal medication. But two of those things are drugs recognized by the medical community and the third is a folk remedy that remains unproven. And while you're right that handling garlic or using henna (my research showed more information about natural dyes staining urine than artificial ones) can turn something a funny smell or color, those things don't have an effect on physiology. It's no more dangerous than eating beets and carrots and seeing the funny colors they produce in the potty.
Molecules have physical characteristics that limit where they go and what they do. Big honkin' proteins don't make it through skin while smaller molecules like nicotine do. A toy poodle fits through a doggie door that a Great Dane can't enter. In this case, JM claims that entire herds of elephants are squeezing through that little doggie door every time we wash our hair.
There is no science to back this up. By what mechanism would large molecules move through skin? We've evolved to have fairly impermeable skin; if we didn't, we'd be susceptible to poisoning every time we waded across a stream or touched a toxic plant.
You just proved my point that substances that affect the body's function when taken in through the skin are called
drugs, not beauty products.