Lactobacillus casei, more commonly referred to as L. casei, is a harmless, nonpathogenic microorganism that has been widely recognized for the attributes and properties it possesses that have been found to be beneficial to the human body.

  • L. casei is a type of bacteria that helps protect the human body from disease and illness by restricting the growth of various types of harmful bacteria that cause infection and be detrimental to an individual’s health.
  • L. casei may be found in “raw or fermented dairy and fresh or fermented plant products.” These sources may include yogurt, cheese, and other types of food sources such as fermented green olives.
  • According to the World Health Organization and the Food and Agriculture Organization of the United Nations probiotics are “live microorganisms, which, when administered in adequate amounts, confer a health benefit on the host.”
  • Because of the benefits L. casei offers it is typically categorized as a probiotic.


  • Lactobacillus casei is a beneficial bacteria that is found naturally in both the mouth and intestines of human beings.
  • It produces lactic acid which helps lower pH levels in the digestive system and impedes the growth of harmful bacteria.
  • It is able to improve and promote digestion.
  • Some strains of the bacteria help control diarrhea, while other strains have an anti-inflammatory effect on the gut.
  • Other advantageous effects include reducing lactose intolerance, alleviating constipation, and even modulation of the immune system.
  • Its also used to treat Crohn’s disease



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