Comfrey Extract


Plant extracts

No known benefits

Comfrey Extract description

Comfrey extract is the extract of a perennial herb. Topical application of comfrey has skin-soothing properties, but it is recommended only for short-term use and only then if you can be sure the amount of pyrrolizidine alkaloids is less than 100 micrograms per application - something that is impossible to determine without sophisticated testing equipment - making comfrey an ingredient to avoid. The alkaloid content means it has the potential to aggravate skin. For more information, please see the entry for _Symphytum Officinale_ Extract.

Comfrey Extract references

  • Chemical Research in Toxicology, November 2001, issue 11, pages 1546-1551

Peer-reviewed, substantiated scientific research is used to assess ingredients in this dictionary. Regulations regarding constraints, permitted concentration levels and availability vary by country and region.

Ingredient ratings


Proven and supported by independent studies. Outstanding active ingredient for most skin types or concerns.


Necessary to improve a formula's texture, stability, or penetration.


Generally non-irritating but may have aesthetic, stability, or other issues that limit its usefulness.


There is a likelihood of irritation. Risk increases when combined with other problematic ingredients.


May cause irritation, inflammation, dryness, etc. May offer benefit in some capability but overall, proven to do more harm than good.


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Not rated

We have not yet rated this ingredient because we have not had a chance to review the research on it.