We all know there is no magic bullet for obesity, and lifestyle changes are obviously crucial, but acupuncture appears to have a useful role to play in that it can safely and effectively reduce appetite, without the dangerous side-effects of some other treatments.
Food allergies and intolerances can also contribute and should be addressed.
For acupuncture research see:
http://www.jcm.co.uk/catalogue.php?catID=715&opener=0-691-715