A large body of evidence proves that acupuncture
stimulates the release of endorphins
, endogenous opiate-like substances.
While this explains how acupuncture helps pain, it doesn't explain other proven benefits of acupuncture, so there are obviously other mechanisms at work too (like the chinese concept of meridians). Seenhttp://www.Medicalacupuncture.Org/acu_info/interviews/pomeranzart.Html.