Comfrey (Symphytum officinale)

be careful with this herb. it's a good herb but be careful. i usually only use it 10 days at a time or so and only a few times in a year. see these links

Pyrrolizidine Alkaloids in Comfrey

List of all pyrrolizidine alkaloids in comfrey and related research on toxicity.
www.comfreycentral.com

Safety Issues Affecting Herbs: Pyrrolizidine Alkaloids

ITM Online provides education, and offers theraputic programs with a focus on natural healing techniques, such as herbal formulas, acupuncture, massage, diet, nutrition, and general health care. ITM is a 501(c)(3) tax-exempt non-profit organization. The primary focus of its efforts is the...
www.itmonline.org
 
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