Undecylenic acid: A Powerful Anti-Fungal Fatty Acid


Undecylenic acid is a synthetic unsaturated fatty acid. It is prepared from the natural product, ricinoleic acid, present in castor oil.  Undecylenic Acid is naturally-occurring in human perspiration and is an unsaturated fatty acid. It is the common name of 10-undecenoic acid, (CH2=CH(CH2)8COOH).

Undecylenic acid has been shown to be very effective as an anti-fungal and effective against detrimental yeasts, especially candida albicans. 

The researched studies on undecylenic acid are listed below:

  • Undecylenic Acid may inhibit various types of detrimental fungi and detrimental yeasts    1
  • Candida albicans   2
  • Trichophyton is a genus of dermatophyte detrimental fungi   3
  • Efficacy of undecylenic acid against Trichophyton rubrum or Trichophyton mentagrophytes   4
  • Undecylenic Acid (applied topically) may inhibit Herpes Simplex Viruses   5

Salts of Undecylenic acid have been demonstrated to be up to six times more effective against detrimental fungi compared with regular Undecylenic acid.  The most common salt of Undecylenic acid is calcium undecylenate.

Informational References:

Alternative Medicine Review Monogragh – Undecylenic Acid


Swanson Health Products – Undecylenic Acid

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