Why do we buy what celebrities are selling?

katyproactiv.jpgWhat do Justin Bieber, Katy Perry, Sean "Diddy" Combs and Jessica Simpson have in common? All of them are on the payroll of the acne rememdy Proactiv. What's the difference between Proactiv and other well-known  remedies such as Clearisil, Stridex and Oxy? According to Dr. Rahul Parikh -- a prominent physician in San Francisco who writes a weekly medical blog on Salon.com -- very little.
That is, except for price. At about $60 a pop, the "Proactiv System" costs ten times more than other over-the-counter creams.
So what's in this blockbuster drug? According to Proactiv's website, it's active compound is benzoyl peroxide... the same thing found in the other over-the-counter medications. Despite this discrepancy, there are dermatologists that stand behind the product, while admitting it is unfairly priced.
Listen to Jian's interview with Dr. Parikh below, and let us know what you think. Despite the product, why do we buy what celebrities are selling?
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