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Acetic Acid

Rating: Bad
Categories: Irritant, pH Adjuster/Stabilizer

Acetic Acid at a Glance

  • Byproduct of fermentation
  • Main component of vinegar aside from water
  • Used to adjust skin care products’ pH
  • Has mild antimicrobial properties
  • Overuse or misuse can result in skin damage

Acetic Acid Description

Acetic acid, also known as ethanoic acid, is a type of acid that is a byproduct of fermentation, i.e., the breakdown of a substance by bacteria, yeast, or other microorganisms. It is the main component of vinegar aside from water. In its raw form it is a clear, colorless liquid with a distinctive vinegar smell.

Acetic acid has multiple uses in commercial products, including as a food additive to increase product stability. It is also used in some skin care products to adjust and maintain their pH. Acetic acid has antimicrobial properties – but not of the same potency or effectiveness as FDA-approved antimicrobial agents such as benzoyl peroxide.

While some people do use different types of vinegar – of which acetic acid is a major component, as mentioned above – as skin care home remedies, researchers have found that it is also commonly misused, which can result in skin damage. For certain, vinegar and its components do not outperform long-proven over the counter and prescription-only acne treatments.
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Acetic Acid References

International Journal of Dermatology, July 2022, pages 804-811
Virginia Department of Health, Website
Australian Government Department of Climate Change, Energy, the Environment and Water, Website
CosmeticsInfo.org