Research published in the British Journal of Sports Medicine now says that topical treatment with comfrey root extract can reduce acute upper and lower back pain.
In the study, published in May, 2009, German researchers assessed back pain in 120 patients who either used 4 g of comfrey root ointment or a placebo ointment three times daily for 5 days.
Pain intensity dropped by 95% in the comfrey root extract group, while the people using placebo only got 39% better.
More good news? The comfrey extract began wiping out the pain in under an hour.
“Comfrey root extract shows a remarkably potent and clinically relevant effect in reducing acute back pain,” the research team concluded. “Reduction of pain and impaired movement was fast and correlated with each other.”