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E. Botox: A Little Goes a Long Way

Narrator: This is Science Today. More people - especially women - are turning to Botox, an injectable cosmetic procedure, to erase furrowed brows and look younger. Botox works by essentially paralyzing the muscles that cause wrinkles and according to Dr. Richard Glogau, a dermatologist at the University of California, San Francisco, the drug's effect lasts about three to four months.

Glogau: With repeated treatment, there is a tendency to lengthen the time because quite honestly, your brain kind of forgets how to frown after a while. So not infrequently, we see people that go out five, six months in between treatments - but that's about it. So there's an investment in terms of money and time to get that effect.

Narrator: Glogau reminds potential patients that a little Botox goes a long way

Glogau: One problem I have is I see too many patients that have been over-treated. They've had way too much done, they have a mask-like appearance and I try to tell patients all the time that the best results with Botox come with a little less.

Narrator: For Science Today, I'm Larissa Branin.