Lyofast LRB consists of Lactobacillus rhamnosus producing bacteriocins. Lyofast LRB is a protective culture inhibiting unwanted bacteria, yeasts and moulds. Lyofast LRB may be applied in generic probiotic products such as e.g. fermented milk products and in feed. Furthermore, Lyofast LRB might also be used for pharmaceutical purpose. The culture develops a weak acidity and aroma from slow citrate fermentation.