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Hamamelitannin

Worst

Irritant

Hamamelitannin at a glance

  • Present in witch hazel
  • A tannin with antioxidant properties
  • Can denature skin
  • Skin-sensitizer with repeated use

Hamamelitannin description

Hamamelitannin is a tannin that is found in witch hazel (AKA _Hamamelis virginiana_). Tannins are potent antioxidants, however, they also have the ability to denature proteins on skin when used consistently. This can result in skin barrier impairment as well as sensitization.

Related ingredients: Witch Hazel Hamamelis Virginiana

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Hamamelitannin references

  • International Journal of Trichology, July-September 2014, pages 100-103
  • Chemical Research in Toxicology, March 2008, pages 696-704
  • Skin Pharmacology and Applied Skin Physiology, March-April 2002, pages 125-132
  • Phytotherapy Research, June 2002, pages 364-367
  • Journal of Dermatologic Sciences, July 1995, pages 25-34
  • Journal of Inflammation, October 2011, page 27

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

Best

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

Good

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

Average

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

Bad

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

Worst

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

unknown

We couldn't find this in our ingredient dictionary. We log all missing ingredients and make continuous updates.

Not rated

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