New UC San Francisco research shows significant price differences for ten common blood tests in California hospitals, with some patients charged as little as $10 for one test while others were charged $10,169 for the identical test.

It sounds like science fiction, but it seems that bacteria within us – which outnumber our own cells about 100-fold – may very well be affecting both our cravings and moods to get us to eat what they want, and often are driving us toward obesity.