Scientists have discovered a possible evolutionary explanation for the placebo effect with new evidence suggesting the immune system has an on-off switch to save energy.

People who suffer from a weak infection often recover whether they take a medicinal drug or a simple sugar pill – which suggests humans can heal themselves.

But this has begged the question why people need to wait for the placebo before the recovery process from an infection begins.

Read more at Mail Online.

Published On: September 8, 2012

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