Painful, stiff knees limiting your life? The Berman et al. 2004 Annals of Internal Medicine trial found acupuncture significantly improved pain and function in knee osteoarthritis. Here's what the evidence shows.

Chronic low back pain affecting your life? The Cherkin et al. 2009 trial found acupuncture-type care improved function significantly more than usual care alone — with benefits lasting a year. Here's what it means.