There are many placebo-controlled, double-blind studies on acupuncture, both on animals and humans.

For human studies, visit Medscape, the internets largest provider of free, peer-reviewed medical studies (www.medscape.com) and simply search "acupuncture". A good review of the current published medical literature can be found in the study article titled "Acupuncture: A Clinical Review" which comes up when searching acupuncture at Medscape.

There are other websites which publish peer-reviewed medical literature, but they charge to view anything more than the abstracts (PubMed for example).

Research in the U.S. is currently being done thanks to grants from the NIH which finally became available in the mid 1990's. Many difficulties with acupuncture research including the task of making the studies double-blind and placebo-controlled, but after a rocky start in the 1970's, the field has produced solid research. There is a speciality for physicians called "medical acupuncture" and they have their own peer-reviewed journal which publishes evidence-based clinical papers and research findings. The journal is called The Journal of the American Academy of Medical Acupuncture. Google it and I'm sure you will find more information.

Hope this helps all involved...

Jack