DUOLAC is a multi strain probiotic

Strain cocktail technologies unique to DUOLAC consider the environment
within the small and large intestines of Koreans as well as strain growth rates.

Are mixtures more effective than single strain?

According to a scientific paper published in an European academic journal titled,
‘Health benefits of probiotics: are mixtures more effective than single strain?’
75% of 16 studies show the effects of multi-strain probiotics are far superior to that of single-strain probiotics eg Yoon et al (2013) studies.