Comfrey grows in most areas of the United States, and it thrives in rich fertile soils. Started by seeds or by root divisions, this perennial plant reaches a maximum height of about 3 feet and produces blue or yellow blooms in summer. Comfrey loves sunshine, but in hot climates, the plant benefits from partial shade. Organic growers use only natural, non-toxic fertilizers. Harvested for its potentially beneficial leaves and root, comfrey, or Symphytum officinale is an ingredient in topical ointments and salves. Internal use of the plant is controversial; talk to your doctor before using any internal comfrey product.
Certified Organic
To receive the organic label, a comfrey grower's field must be certified by the USDA Organic Program. The grower must use only approved organic substances for a period of at least three years and show detailed records. The USDA will inspect the field yearly to make sure the grower complies with the rule. Organic herb growers cannot use chemical pesticides or herbicides that are detrimental to humans.
Comfrey's Constituents
The leaves and root of the comfrey plant contain allantoins, tannins, mucliages and trace constituents that may be beneficial in promoting the healing of wounds and soothing of mucus membranes. While consumers want to avoid the risk of using any herb tainted with dangerous chemicals, comfrey contains its own potentially dangerous component: Pyrrolizidine alkaloids, also present in the herb, may be toxic to the liver and cause cancer, according to the "Gale Encyclopedia of Alternative Medicine," although controversy exists concerning the herbs safety. Do not use any type of comfrey internally, unless directed to do so by a doctor.
Potential Health Benefits
Both the leaves and the root of comfrey are potentially beneficial in treating external disorders, including swelling, bruising, boils, minor burns and breast pain when applied as a poultice. Internal use, which is no longer recommended, includes the treatment of diarrhea, colitis, ulcers and hernias. Clinical studies confirming these benefits are lacking.
Considerations
By purchasing organic comfrey, you may avoid dangerous contaminates in the herb, but other factors, such as the time of harvest, nutrient content of the soil, and the method used to prepare the herb, may also have an impact on quality and safety.
References
- "PDR for Herbal Medicines, 2nd Edition"; Joerg Gruenwald, PhD; 2000
- "Gale Encyclopedia of Alternative Medicine," vol. 2; Jacqueline L. Longe; 2005
- North Carolina State University Department of Agriculture and Consumer Services: How to Grow Medicinal Herbs
- WSU Clark County Extension: Common Comfrey
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