Bifidobacterium animalis subsp. lactis HN019

Bifidobacterium animalis subsp. lactis HN019 is a specific, well-characterized probiotic strain originally isolated and patented by Fonterra (formerly the New Zealand Dairy Research Institute), widely studied for its gut health benefits and increasingly used in topical cosmetics as a postbiotic or lysate ingredient. In skincare formulations, it is typically applied as a ferment lysate or whole inactivated cells, where its cell wall components, metabolites, and exopolysaccharides help reinforce the skin's microbiome balance, support barrier function, and modulate cutaneous immune responses. Formulators select this strain specifically because of its extensive clinical safety dossier, its well-documented strain identity, and its ability to deliver microbiome-supportive benefits with a traceable, consistent supply chain.