Which three national patent strains do probiotics contain for a long time?

Bifidobacterium animalis, Bifidobacterium lactis and Bifidobacterium lactis. Probiotics are a kind of active microorganisms existing in human body, which can improve the composition of flora. They contain three national patent strains of Bifidobacterium animalis, Bifidobacterium lactis and Bifidobacterium lactis for a long time. Patent strains refer to patent strains. For example, lactic acid bacteria that make yogurt naturally exist in nature, and people with professional skills can easily be separated from nature.