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1 .This is Scientific American's 60-Second Health. I'm Katherine Harmon. Got a minute?
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2 .When it comes to providing pain relief, expectations can be a powerful prescription.
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3 .That's part of the theory behind the placebo effect, in which people often report feeling better, even after a sugar pill or sham procedure, simply because they expect improvement.
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4 .Now a study finds that there may be levels of placebo effect.
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5 .Forty-five healthy volunteers had a heating electrode placed on their skin to cause discomfort.
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6 .Over multiple sessions, they were either given nothing, or Tylenol, or needle-free acupuncture or electro-acupuncture, in which the needles carry a slight current.
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7 .Painkillers should let them tolerate the heat longer.
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8 .The hitch was that the Tylenol and needle-free conventional acupuncture were fakes.
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9 .The subjects were later interviewed about their expectations.
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10 .And their feelings about each treatment largely determined its effect.
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11 .Those who thought the acupuncture would work were more likely to report pain reduction from both the real and fake acu-treatments.
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12 .The findings are in the journal PLoS ONE.
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13 .They suggest a variable placebo effect, that may depend on whether you swallow that sugar pill with a grain of salt.
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14 .Thanks for the minute, for Scientific American's 60-Second Health. I'm Katherine Harmon.
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