Hosted by Sandra Tsing Loh, The Loh Down on Science is a fun way to get your daily dose of science plus a dash of humor in less than two minutes.
Hosted by Sandra Tsing Loh
Airs Weekdays 2:31, 3:31 and 5:49 a.m.

Science may finally know what causes pimples

Do bacteria cause pimples or prevent pimples?  Which is it?

This is Sandra Tsing Loh with the Loh Down on Science, saying it's probably both.  

Meet Propionibacterium acnesP.  acnes to its friends.  This microbe has long been associated with breakouts.  What's puzzling? It can be equally ample in the pores of people without acne.  What's the deal?

UCLA microbiologists may know.  

They asked roughly one hundred people to open their pores for science.  Half the group suffered from acne, the other half had clear skin.

Everyone applied an ordinary pore-cleansing strip to their nose.  The biologists then analyzed the bacteria that came away.

And?  Turns out everyone had lots of P. acnes.  Oh, no!  Back to square one?  Luckily not.  Careful DNA sequencing revealed something more: people with acne had different strains of P. acnes than people with clear skin.

So it looks like the same bacterium has both beneficial and harmful strains.

Thus, the pimple prone among us need only rub noses with the cute and clear-skinned!  That’s my hope.
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