Reference Work Entry

Textbook of Aging Skin

pp 811-820

Probiotics in Aging Skin

  • Benedetta CinqueAffiliated withDepartment of Health’s Sciences, University of L’Aquila
  • , Paola PalumboAffiliated withDepartment of Health’s Sciences, University of L’Aquila
  • , Cristina La TorreAffiliated withDepartment of Health’s Sciences, University of L’Aquila
  • , Esterina MelchiorreAffiliated withDepartment of Health’s Sciences, University of L’Aquila
  • , Daniele CorridoniAffiliated withDepartment of Health’s Sciences, University of L’Aquila
  • , Gianfranca MiconiAffiliated withDepartment of Health’s Sciences, University of L’Aquila
  • , Luisa Di MarzioAffiliated withDepartment of Health’s Sciences, University of L’Aquila
  • , Maria Grazia CifoneAffiliated withDepartment of Health’s Sciences, University of L’Aquila
  • , Maurizio GiulianiAffiliated withDepartment of Health’s Sciences, University of L’Aquila

Abstract

Health benefits of probiotics have been established by several studies in animals and humans and the scientific literature shows that the clinical uses of probiotics are broad and are open to continuing evaluation. The most common microorganisms used as probiotics are strains of lactic acid bacteria (LAB), which are gram-positive, nonsporing, catalase-negative organisms that are devoid of cytochromes and of nonaerobic habit, but are aerotolerant, acid-tolerant, and strictly fermentative; lactic acid is the major end product of sugar fermentation. Particular attention is paid to specific species of lactic acid bacteria (LAB), including Lactobacilli and Bifidobacteria, that are part of the intestinal microbiota. Most probiotics are included in foods or dietary supplements and are aimed at functioning in the intestine. However, even if gastrointestinal tract has been the primary target, it is becoming evident that other conditions not initially associated with the gut microbiota might also be affected by probiotics.