Youyic is an active lactic acid bacteria beverage launched by Mengniu. In 2009, Mengniu and Kohansen launched lactobacillus paracasei-Vigorous C bacteria with super activity, and launched a new generation of active lactic acid bacteria beverage with the brand concept of "intestinal vitality, eternal youth".

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199 1 year, Danish specialized strain research center combined with 140 years of strain research experience, screened nearly 10,000 strains, and finally found Lactobacillus casei -0 1 strain, which can exert super activity at 37 degrees.

In 2009, Mengniu exclusively used this strain for product research and development, and named it LC-37.