The invention relates to novel Lactobacillus strains isolated from sourdough. Also encompassed is a composition comprising at least one of said Lactobacillus strains with optionally additional other microorganisms such as bacteria and/or yeasts. The invention further relates to the use of said Lactobacillus strains or compositions for the manufacture of human food products and food supplement products or animal feed products. Another aspect of the invention is the use of the Lactobacillus strains or the composition of Lactobacillus strains in human or veterinary medicine or in cosmetics.