Magnesium stearate: an underestimated allergen

J Biol Regul Homeost Agents. 2012 Oct-Dec;26(4):783-4.


Magnesium stearate is a substance often used as a diluent in the manufacture of medical tablets, capsules and powders. Moreover it is usually found as a food additive or pharmaceutical excipient. We report the first case of a 28 years old woman affected by an allergic reaction from this substance with an urticarial manifestation.

Publication types

  • Case Reports
  • Letter

MeSH terms

  • Adult
  • Allergens / immunology*
  • Female
  • Humans
  • Stearic Acids / immunology*
  • Urticaria / etiology*


  • Allergens
  • Stearic Acids
  • stearic acid