A specific type of yeast obtained by the fermentation of Bifida. Limited research has shown that yeast ferment filtrate (a compound different from bifida ferment lysate) offsets oxidative skin damage in the presence of UV light, but this research also showed that many other antioxidants have a similar effect. Still, this ingredient likely has hydrating and possibly some degree of soothing properties, but we’d only advise using it in products that contain other ingredients with more research supporting their benefits for skin.
References for this information:
Experimental Dermatology, August 2009, pages E1-E8
Archives of Dermatological Research, April 2008, pages S51–S56
Journal of Dermatological Science, June 2006, pages 249–257